Malicious PDF — malware analysis report

Static analysis result for SHA-256 065a0b3a5a94c111…

MALICIOUS

PDF

83.4 KB Created: 2021-09-05 06:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c096b356ac1d5d42e45a44353bab3004 SHA-1: 191e8ff48e15932d6c943a9be3c2509bb93f2d5d SHA-256: 065a0b3a5a94c111a522affec671d83cae837ed73d407abc1ed0c6b41f8b3c2c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised WordPress sites or disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72a52f0329---35567532952.pdf In PDF document text
    • https://globalmediaminds.com/uploads/files/41457497208.pdfIn PDF document text
    • http://isvpro.com/custom/files/84924200710.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608083c5afa01---11630123482.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/kajimewitariwitujomok.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a44f3ff04c3---majajarufewuvoxasinud.pdfPDF link annotation
    • http://hotelclinton.it/userfiles/files/dotirimofu.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/nusixogawerufinuver.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/rfog4pbup4it4jike3h6gs6qe1/76448216612.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c2bec05aac529d2037e07896ad9deb28/96467688942.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/70086498440.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/26274791902.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/berapazu.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161274d01b25a6---sutogerajoro.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/kixejogesoripisaw.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8c2a8c7ee---70055913752.pdfIn PDF document text
    • http://safetypath.net/cms_images/xuwovuxizilowilixozar.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/1158af1029c9ac3e625f84a12debd60d/7630063963.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/pixosewolatowow.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/kegevelaxox.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/60380507268.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/zebopuxakafeganimuropa.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/mozoxube.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/bea3b2a84d6968aa27d263247aa4b2ec/bokebenofer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=manual+do+mundo+experiencias+energiaPDF 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_off0000de7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7B 18872 bytes
SHA-256: 6efa633e355f522a0ec42b2cbf9dd20f21ba63d9f009b0815fa9ce1b2b24fc37
font_01_sfnt_off00010f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001273e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273E 10956 bytes
SHA-256: c71ae0056b49c8f03d94b32de8849d58c3ed47fa233aefe65270ede9f2d4f1e8