Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f66e9b550c02c73…

MALICIOUS

PDF

75.8 KB Created: 2021-03-18 09:31:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 13c8f7b2afb37e7647bd572ca5ab5813 SHA-1: 3985315d024f83f2705b2d4c6af5dbd173d62e19 SHA-256: 6f66e9b550c02c736daa88adcfdb23348837113646ab869b621791a5040a92f1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/strik?utm_term=dsc+power+832+trouble+light+4 PDF link annotation
    • http://vefaporuzudu.iblogger.org/lifting_scheme_discrete_wavelet_transform_ppt.pdfIn PDF document text
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/6668612.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/6654160.pdfIn PDF document text
    • https://kopupoko.weebly.com/uploads/1/3/4/4/134471128/teloxetekarokalopito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411493/normal_60293759a82de.pdfIn PDF document text
    • https://kajubuti.weebly.com/uploads/1/3/2/6/132680994/pidibotirun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459469/normal_5fcbd75a53b1a.pdfIn PDF document text
    • https://gilepinewuje.weebly.com/uploads/1/3/4/0/134096317/bononatemudelemem.pdfIn PDF document text
    • http://beststudent.space/wugaduja67b3o.pdfIn PDF document text
    • https://sarogixi.weebly.com/uploads/1/3/0/8/130813770/b37cdd01a1e69.pdfIn PDF document text
    • https://vuxidozeni.weebly.com/uploads/1/3/4/6/134669409/6074529.pdfIn PDF document text
    • http://rubisteq.online/45865655885n0d40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477638/normal_6044dc5846b78.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/tozaduliwubega/nemezerujugosijediwexotuw.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/famugotaruvepopudafojabaf.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/66716296976.pdfIn PDF document text
    • http://dalapodomunok.epizy.com/apprendre_francais_oral.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/camera_black_and_white_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/aggregate_industries_uk_ltd_annual_report.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92F 5792 bytes
SHA-256: 4a4a02c9cc7e0e21ece2f8df155a2fb0fd2fb7878e5fc4ba1a7ec1facb181e43
font_01_sfnt_off0000fd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD05 10932 bytes
SHA-256: bcaadcc36426e9093592c24b5e5bac1876b63a7bc11ba9280ce9ce62ffdd820b

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