Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8b0f3c967eaedb…

MALICIOUS

PDF

118.3 KB Created: 2021-06-17 22:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 46cf5cf6a3657ca1c7f089e90c6206d0 SHA-1: 717251eb113739ee6c176e9c311918fd66854047 SHA-256: 0d8b0f3c967eaedbaee8d7070eb92bf159a81e313aa637584a35f8277edd29d8
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of a phishing and malware distribution lure. It directs users to install browser extensions or updates, a common tactic to facilitate credential theft or further malware deployment. The document also contains numerous links to potentially compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://catamma.ru/uplcv?utm_term=free+netflix+account+generator+2020 PDF link annotation
    • http://clear-es.net/yamituki-n/uploads/files/jatug.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/43ab66625d31c9b8ad26ce4266a116ac/mumupovupob.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608358eb4de18---65782498591.pdfIn PDF document text
    • http://schmetterlingsgaerten.de/file/94915997701.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/rumetojebekuxetar.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16093a61573303---45900980964.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/lawazepokewafaw.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/7ffc5ffed321e8f4bc410e4b48709dc5/sidomitapenojiruda.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075ce6aeaff7---85276977728.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/58610438228.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/srokkdphrkenst7grc48c4pjen/fekarisajogesapalerin.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4c259a68b---zujotixaxibumugokojonuxon.pdfIn PDF document text
    • https://samowar.ch/upload/file/lijuzazafut.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608853f26a4ab---34562811813.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609618c985607---redodagukove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E80 3576 bytes
SHA-256: 50ea4928ed6e8edaf849ccc5eccd35e991dd1600380387d6c0423f9f0c3ef38b
font_01_sfnt_off00014b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2D 5168 bytes
SHA-256: 2fcce6b0600004386112a01523dbdbc305ac3524ff2252bc5bafe49072f8bc90
font_02_sfnt_off00015cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD3 3384 bytes
SHA-256: 9bfacd2d213e59dfc7fc145ebdea6d17c21053855cca12b9a2ee73021c555345
font_03_sfnt_off00016a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A5A 20984 bytes
SHA-256: 8216cf1a9eadd795bed81d75c49d90d832426d361657d99646d1c181ff15511a
font_04_sfnt_off00019deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DEB 18412 bytes
SHA-256: eb877f27b2bcacc74cdf173d4a4a88ef493c8165ba4a01f094fa02dc84de4884
font_05_sfnt_off0001bb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB6B 6048 bytes
SHA-256: 34c44bfe089d16630a1ba68c94e139ec7bda3dd8a85e57b64524c8a357ab65a2

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