Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffaf04070eb7d4b…

MALICIOUS

PDF

66.1 KB Created: 2020-12-09 06:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0fb1247bbf2ac88ef10a11eb121a6c67 SHA-1: 2f81dba5c90db6cadb2b85c986c5a2f4e51f6f4e SHA-256: 0ffaf04070eb7d4b83aba55219357e4d341e67905b6b537532ec86134f0a45b3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as part of a link farm. One of the primary external links points to a URL containing 'maritime english volume 2 answers', suggesting a lure to a content-based scam. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafficel.ru/wb?keyword=maritime%20english%20volume%202%20answers PDF link annotation
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/mafiwelipebo-sutozetigid-tewul.pdfIn PDF document text
    • https://gililizu.weebly.com/uploads/1/3/4/7/134770310/lekogoferimubuz.pdfIn PDF document text
    • https://mewaxoraveju.weebly.com/uploads/1/3/4/8/134897470/ebce21562548e13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe19233f75b166439d65c4/1606293796210/myinstantoffer.com_promo_code.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b49c60f2895dc108b686/t/5fd0045f055cc35c686dad42/1607468136035/best_slots_games_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57f453398ff75154cec93/t/5fcd48ac7ae85b53b29fdf57/1607289007405/good_basketball_drills_at_home.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55af8403f5353fdb347d6/t/5fcf2af30ff3944fc554d481/1607412468331/my_town_iceme_amusement_park_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/top_funny_memes_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287ecda7-7ba5-4738-97a9-2078c198e7a3/nwfa_hardwood_flooring_installation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3703b8ef7301f8b20f9e5/t/5fc5d3999ee0f32b871d939c/1606800281892/vomakesog.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/fekobikotesagi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc689fec14dfd36fe18787c/t/5fcd6df5f94b6402b22e8e8a/1607298551227/48188910606.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f28524b06a7eb30cb0f7/t/5fcd9aad24c49707d33a4700/1607310000502/ugandan_knuckles_vrchat_queen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf7d39b1ed03538a02408/1606285272027/85846783806.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_off0000c5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D3 5388 bytes
SHA-256: 09a0cd6672c37fd766323bfb0710f29f1a88e3fe66b7f7feadff6f51b2467ab0
font_01_sfnt_off0000d81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81C 10436 bytes
SHA-256: 3986d6831fa6d379918b0b3d11aba0c0463c33d07fff1bf95c9a48c577443e0a

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