Malicious PDF — malware analysis report

Static analysis result for SHA-256 715559ea29b09785…

MALICIOUS

PDF

73.3 KB Created: 2020-12-05 19:18:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bf3eeee2f18363bffb93305a314ddd99 SHA-1: 2df55f513b6fe357cdf6eee8fdee11b42f3837fa SHA-256: 715559ea29b0978544332f6ee109bae9ad027260740778c746de3a31cb8ece61
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Application Data T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an MFA/2FA-themed lure. 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-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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://trafficel.ru/aws?utm_term=bihar+tet+form+fill+up PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499984/normal_5fad41fa85956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5fa949499aa83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415544/normal_5fc2ac2312109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_5fbd40b317f3c.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/newogunoku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413566/normal_5fc5680ab5144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f88587986765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387928/normal_5f915666a698a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_5fa410562ce9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc144dc68612547ed60a5eb/t/5fc324e6bc819f1cf43fc8ea/1606624487295/remember_the_titans_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc971c8c741314319700/t/5fc156827acac6192af2a2ee/1606506115290/windshield_survey_example_nursing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3b1150b6b03258f46d597/t/5fc4f743fa04221c71bb8797/1606743876119/94956943438.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_off0000e3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A9 5012 bytes
SHA-256: e2ec4d724e07bebbaf3e1c8782b03045848ba6b5cea16f3ab8bbf130c9461f5c
font_01_sfnt_off0000f48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48D 10876 bytes
SHA-256: 1fd35b798bb10348478bdafb444efb9156d1c1311c688d8d541736967ec9c671

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