Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c42f8f408eaf622…

MALICIOUS

PDF

79.7 KB Created: 2021-02-14 06:15:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 90759b22cf6e2b63bdf040f5bb07b0d4 SHA-1: 5a45616cf50d4f267edab55d39a4cf6d556605d3 SHA-256: 0c42f8f408eaf622d6f523d1e237b2826042fb67cd18d2f79476f26c9ae8ff7b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO abuse attempt. The 'SE_CALLBACK_LURE' heuristic indicates a potential callback phishing or tech-support scam pattern. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest malicious intent, likely to redirect users to malicious sites or initiate fraudulent interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://leonvi.ru/aws?utm_term=pttep+annual+report+2018 PDF link annotation
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/8951334.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/jiiiiD8/kebibub.pdfIn PDF document text
    • https://dununatanag.weebly.com/uploads/1/3/0/7/130775655/larupefuwele.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/4243288.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/8243820.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/folanor.pdfIn PDF document text
    • https://bapamebitisetup.weebly.com/uploads/1/3/4/3/134325238/liwipoper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/patotale/princeton_review_sat_book_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/disable_user_agent_stylesheet_css_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/torenuzogamuwibazofi.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/blender_software_free_for_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/anniversary_invitations_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/apex_legends_pc_epic_games.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/spanish_family_tree_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/gonurituvaritutonajadas.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 5156 bytes
SHA-256: 9e186f445d4509a4302bb2eac216b8bcc266ace250860dc0efab816d8be33834
font_01_sfnt_off00010bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEF 11148 bytes
SHA-256: 4c4280fb36a04574e9d74daceda956ba88ff67cb600eaff7afc97a913e472586

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