Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a200a3da9bade7f…

MALICIOUS

PDF

121.7 KB Created: 2021-09-14 18:36:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 405df889b3300bdd0bb39a2cace6b2c6 SHA-1: 649f929ceee120633383431affed77a25a0f88d4 SHA-256: 0a200a3da9bade7f81f372ef0efa39522919053ebafee559338a820fd74803f1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs that form a link farm. These links predominantly point to other PDF files hosted on various domains, many of which appear to be compromised CMS upload directories. The presence of embedded JavaScript and the link farm structure suggest an attempt to redirect the user to malicious content or to download further payloads, aligning with phishing or credential harvesting tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://mediasingrid.com/js/new/fckeditor/userfiles/file/lizonobakeni.pdf In PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/62049133552.pdfIn PDF document text
    • http://artio.pl/files/files/kapewewozojiwowatetilo.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/midow.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/09a08b8d7a4e1b4fda76230228a392ee/1540687523.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/6ujhkhnrqareg0dp5t992t7gd5/segifagevewawivozewato.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/59259551629.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/8184416482.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/78579266483.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/99385100370.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/takeg.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/32130308487.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/guruminedes.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/161345c4066de1---tenudiragum.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8920352ca---42280863418.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/6bjehiq8c33kfm72pqhqqa2ti3/74699350453.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff83eec75c---tukiwetugenidadeped.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/wakekiz.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/gitasidawuv.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/64666375786.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/xujikiwenewobibib.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/xonux.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/38925935562.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+good+food+revolution+pdfPDF link annotation
    • 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_off0001754e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1754E 19652 bytes
SHA-256: 91cb22f746234e134457221c605978324dc5fa3f8d4a30b6440408554032a502
font_01_sfnt_off0001a8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0D0 10576 bytes
SHA-256: 310a1e4b985bf1585c60eeb491f6ae3b410c8966b58d98eebc88a1b2ec1f662c

Open this report in the interactive analyzer, or submit your own file for analysis.