Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6975467a4fc25c…

MALICIOUS

PDF

79.7 KB Created: 2021-03-08 17:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0813e632908c6ce180dd71942accf294 SHA-1: f106a974e64a966de1eac7e5e0743c0f2fc0e508 SHA-256: fa6975467a4fc25cca6968ce02482b864c50685c8a1f970a5d92c33a8e885ca3
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

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://bologen.ru/123?utm_term=bidirectional+visitor+counter+project+report+pdf PDF link annotation
    • https://tidekomix.weebly.com/uploads/1/3/4/4/134441433/novoxoxur_zogulananaxolok.pdfIn PDF document text
    • https://pomaxobizo.weebly.com/uploads/1/3/1/1/131163853/zusalisadeko.pdfIn PDF document text
    • http://rollernefritmassage.xyz/81345868871c7vx7.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/vatasolubajonefalobawjtkor.pdfIn PDF document text
    • https://mitesevutij.weebly.com/uploads/1/3/4/7/134717039/7bf3b99.pdfIn PDF document text
    • http://prodson.fun/fixodomodj71o8.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/a9ae0d886f63255.pdfIn PDF document text
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/xibabexopor-segukodafo-xojekagizadas.pdfIn PDF document text
    • https://viwoposiruxeduz.weebly.com/uploads/1/3/4/6/134633276/5884719.pdfIn PDF document text
    • https://maxijegiv.weebly.com/uploads/1/3/4/1/134131269/sopabamikigakuke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_c70e7ab4ef174000923b78c36ed16c45.pdf?index=trueIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_a98255b9db0e4a89b0ed421d44a46759.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/sims_3_64_bit_update_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/51094139484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dad3701-28d4-4a18-bad1-31e83d0646e0/what_is_the_cash_flow_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/cnc_machine_types_and_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/xutiwaworigel.pdfIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_47b593f0d8e7487abf33768447e8ba13.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88467596-e75f-4410-b998-b89c0af21e50/magimoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50801471-c6be-4963-87de-025923572bc0/wonupixegake.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/data_structures_and_algorithms_in_java_interview_questions.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_off0000fcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 5336 bytes
SHA-256: 02f2a2d2e74dfb03e57bddee336586a4c70845b818f0628e44f79b059e2c3faf
font_01_sfnt_off00010f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2B 10032 bytes
SHA-256: 43dd0bc41f02172b70cf577f2a2e98f6a7cc40980d664634917677586e7f1572

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