Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71fe5559e3922a1…

MALICIOUS

PDF

79.9 KB Created: 2021-01-23 00:08:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a42da9bd33911c3c8422a12a9136a20b SHA-1: 9213601a218fcfec67249410d52e31b01ef14825 SHA-256: f71fe5559e3922a110cb81688c62820ce82a13754ae0237669f0e67691f5502b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, including a significant link farm, indicating a likely attempt to direct users to malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

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://traffnew.ru/aws?utm_term=blackmart+application+free PDF link annotation
    • https://cdn.sqhk.co/xovujiroveg/igyhboc/pokeball_plus_mewtwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494661/normal_5fe1717b9c7e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374188/normal_5fce8b23ae260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_5fd6217ab754e.pdfIn PDF document text
    • https://pifaxatopegamu.weebly.com/uploads/1/3/4/1/134108845/lukimolopi.pdfIn PDF document text
    • https://xifugewelude.weebly.com/uploads/1/3/4/3/134353264/nipubojawew_nadaworegiduja_nedetokolo_wofapadapoxo.pdfIn PDF document text
    • https://robavefozaxun.weebly.com/uploads/1/3/4/3/134379548/2431375.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gotijejaj/cavaliere_medievale.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/multiplication_fraction_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/academic_information_on_twitter_a_user_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/capitaux_permanents_formule.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/80932568134.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/5575301457.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/coroners_reports_public_uk.pdfIn PDF document text
    • http://veguxakafopuvix.epizy.com/40668594029.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/76941325649.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED04 4884 bytes
SHA-256: 7007749d8347b23471a05caf49d318aa8cb21312c0adc072fda43b67f5e8f831
font_01_sfnt_off0000fd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD79 11648 bytes
SHA-256: 38d018d46b2beb21ec5446eaa38e36019e9c134b77c923b67203b69b0615a870
font_02_sfnt_off00012482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12482 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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