Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c7fb930763888c…

MALICIOUS

PDF

82.8 KB Created: 2021-03-06 19:53:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8c2fed194afcd2c0f83b00341a24a863 SHA-1: d8b0ad369edd0de7b7289c1713693c50b15de886 SHA-256: e6c7fb930763888ca88f539adecf438ba9c858860ae2b9e6cc5714fc65bf3165
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, 'https://vilenefex.ru/award?keyword=when+is+the+annual+payment+for+planet+fitness', appears to be a lure for users interested in payment information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/award?keyword=when+is+the+annual+payment+for+planet+fitness PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409250/normal_60247b4543508.pdfIn PDF document text
    • https://xonujofepip.weebly.com/uploads/1/3/4/3/134385468/0dd616b7f1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_601c885f96dc6.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/pelag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470537/normal_5ffe1713acc8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_603ce8764172c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389352/normal_5ffc026b404df.pdfIn PDF document text
    • https://rimedugomo.weebly.com/uploads/1/3/0/7/130740195/7b652.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_1152c2ee82664271a45186358bba3a7a.pdf?index=trueIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_e62c1b41c8d64df7a62e9930613b66c5.pdf?index=trueIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_84bdea923c6741f69ea4ee9e2484e442.pdf?index=trueIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_d0d1dd0868c14af5a21a1e49833f8c78.pdf?index=trueIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_ec250fc1c58c4a0c926219748cf81ed4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/69255192576.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/93190062511.pdfIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_f577307463364aac9c7f39f1a193db98.pdf?index=trueIn PDF document text
    • https://807eaacf-9fb6-4e16-bcb8-061395d1d132.filesusr.com/ugd/a3ef2e_5e73cca29f814484bbe8f1128b71d634.pdf?index=trueIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_44c72e0633de4645970969d85d86f8bc.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_1b2d035b2d314499b1318e9f61f6181a.pdf?index=trueIn 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_off00010960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10960 5256 bytes
SHA-256: 4511ba336295a780f0f6d3f1f5afd8a6b33b3c570bbe07ad513d5783ef6a3b63
font_01_sfnt_off00011b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2A 10168 bytes
SHA-256: d6fb27aa29a7785ee7cf2cd8617932cccc5e519c6bab3dfd830b16da50c54c49