Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbf0612a344f43e…

MALICIOUS

PDF

94.0 KB Created: 2021-06-26 10:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9216ab0acb32c99055ee1d1d87f976f5 SHA-1: 031677e4b660aba543adae95a9b9479d92a0f44d SHA-256: 0dbf0612a344f43e0a80592c95e77420628c5ac199c8394ab45dfd7702463c75
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded URLs, many pointing to compromised WordPress sites and raw IP addresses, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the extensive use of external links is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://philabc.ru/uplcv?utm_term=you+have+a+beautiful+heart+quotes PDF link annotation
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac686639d1---65896115568.pdfPDF link annotation
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8eaef998bc---moxuwowawezutadexale.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/794b43c87b70c9e98377520dc367a6cb/woxofuxotowonejavavewe.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/5029873698.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/3bijclfljvfcqeba8miui9o8k7/48263906141.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084371a6a37a---78499026453.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f701f0afdf---36382657386.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/molojulodadam.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20142547f9---rotuworukasakokivi.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/tezadalivitezuwotuwov.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/92781924347.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba8e4d732f---2047939619.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609a378942262---nufuxan.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/1087668426.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/6d52044afc14233dbfbda3b3bb87b710/zozuvuronageforepuzukeg.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5fcf9af27---kovarijo.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a724a22185---77223091716.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5c9a0140f---fuvuvawolar.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/nizoj.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/zosajuzojivitasepe.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/85b3c99f1ec351fac7b41f8d3aff646b/zagapetadaderinil.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/g0oebcpejcnb9g9l73mstotc61/2729491419.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/7a093deb7fe985783dd33f099a55d22d/10201596562.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/33569468260.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/iq9h3q4dqbba3462jbllth6tg3/65666086883.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/95a7436069007af248f2f96b1ad9a8e3/vonefapozer.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/96327385446.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE4 17364 bytes
SHA-256: 72e6aab52501695d11762b59f24797003faacdea5a3a7848746d1aebf287deb5
font_01_sfnt_off00013815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13815 10640 bytes
SHA-256: 685af3bae53428d6ca101db055cf673aeeddfa02237e95d265e4e86764d94e14
font_02_sfnt_off0001509f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1509F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1