Malicious PDF — malware analysis report

Static analysis result for SHA-256 405433824dd21c3d…

MALICIOUS

PDF

76.3 KB Created: 2021-02-25 10:28:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 951ff6af2c18f227c0f0e7902ed2d6e2 SHA-1: 9179e03d5e30ec65e41e1db952562c230b956ead SHA-256: 405433824dd21c3d9bc134a6c1db7dc9e561021db7da8f9269d3d9ed270cd97e
186 Risk Score

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 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/aws?utm_term=shark+garment+steam+iron PDF link annotation
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/25770d2d6c0a850.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/dr_joe_dispenza_becoming_supernatural_free8j2wl.pdfIn PDF document text
    • https://faxezufag.weebly.com/uploads/1/3/0/8/130874059/vovedutole_lokaka.pdfIn PDF document text
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/5812573.pdfIn PDF document text
    • http://muzoc.xyz/stickman_and_shotgun_3kybvj.pdfIn PDF document text
    • https://fitadidexedas.weebly.com/uploads/1/3/5/9/135977916/750869.pdfIn PDF document text
    • https://nupowanekajotut.weebly.com/uploads/1/3/0/8/130815303/fagikotonukoger.pdfIn PDF document text
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/415dba3c5239110.pdfIn PDF document text
    • https://xukutejupu.weebly.com/uploads/1/3/4/4/134487517/607161402ee.pdfIn PDF document text
    • http://strongcreditscore.info/why_is_my_calculator_in_scientific_notationzc6iz.pdfIn PDF document text
    • http://eduha.online/ten_tips_for_a_successful_mentor_mentee_relationshipc53gf.pdfIn PDF document text
    • https://jonenatone.weebly.com/uploads/1/3/1/8/131872225/vebubo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodegifu.atwebpages.com/mary_rowlandson_a_narrative_of_the_captivity_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/instagram_er_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/cambridge_key_for_schools.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/37485509309.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/dazanubutenexodovobi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/98323750357.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/how_to_change_a_ceiling_fan_downrod.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/28424033805.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_off0000eccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCC 5232 bytes
SHA-256: a079b9b308fff08764efa53d11175862ef968903d5b980aa4bfddbe31befff3b
font_01_sfnt_off0000fe6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6A 11080 bytes
SHA-256: 7bc6653a59d1492eaf44b85723ec1cd20aab0fdbb7ed8d6ecf93d1027d3534bc

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