Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70f6a324e5626a4…

MALICIOUS

PDF

82.9 KB Created: 2021-05-18 07:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2ac7417cd6988c76bd9578f5e76309da SHA-1: 2d505d8fe2c413c7cee6f0559e7c58917bc2a385 SHA-256: b70f6a324e5626a4f6c42e61bc9acb50d61d02811916dde264fd52d1721bd645
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing campaigns. The document body, though partially garbled, suggests a lure related to obtaining exclusive content, which is then linked to a URL that appears to be part of a malicious campaign. The presence of a PDF_SEO_LINK_FARM heuristic further supports the idea of a link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://jacksth.ru/strik?utm_term=como+para+conseguir+onlyfans+sin+pagar PDF link annotation
    • https://bemisawu.weebly.com/uploads/1/3/4/7/134716701/kipojikakotek.pdfIn PDF document text
    • https://lafezarawowaw.weebly.com/uploads/1/3/0/8/130874252/vopuwuv.pdfIn PDF document text
    • https://fubaxegadajud.weebly.com/uploads/1/3/4/4/134454669/f9d404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499660/normal_603a682d7be3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_605afde521faf.pdfIn PDF document text
    • https://rekepepijo.weebly.com/uploads/1/3/4/0/134018016/849da2.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/c180f287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_5fdc89eac6d00.pdfIn PDF document text
    • https://bokesaxigalul.weebly.com/uploads/1/3/0/7/130776824/jidaguxopi_tuwinakim_kadigif.pdfIn PDF document text
    • https://jabikazisejifo.weebly.com/uploads/1/3/1/6/131606509/397d78cf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489257/normal_5fea26f7caa6b.pdfIn PDF document text
    • https://jepexilopenokaf.weebly.com/uploads/1/3/2/6/132680937/jiribune-vufipexuruwuj.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/rewepalazamiso/duxexafazebew.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/speaker_booster_for_android_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11561048-82da-47ac-81cd-7876ecfbe8ee/48035891321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e6c1c3-a00e-48bc-b2df-3c2b76e536f2/6988391061.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/amazon_fire_8_tablet_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/pr_crisis_management_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/40096344183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9bb156-cf2d-4d51-a4a5-819dedee26cb/76820050776.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/alaska_map_template.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_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 5340 bytes
SHA-256: 24a8249868c24862bc34c4a12d7fafd7ec1ec63b746be0f0614dd3728cf74c75
font_01_sfnt_off000113ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EA 12544 bytes
SHA-256: 422d2112a86395da3a58f642b191bac0fbd4b988a9687bb1a2c5f93e02639b5b

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