Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54f4c601b5dddbf…

MALICIOUS

PDF

68.8 KB Created: 2021-02-11 15:27:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 301722a8e080fc26dd7b26908c5b6c48 SHA-1: 5d4e16aa841f2bec5ddbd7f59b55cae2810b5b4e SHA-256: e54f4c601b5dddbf09cf37aa1e03f7e3b8a659d300b402fe678ba46aa20def6d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many hosted on disposable domains like 'weebly.com', suggesting a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. The document body's content, referencing a "weed eater blower vac 1925 manual", appears to be a lure to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://druttle.ru/wix?keyword=weed+eater+blower+vac+1925+manual PDF link annotation
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/817b98.pdfIn PDF document text
    • http://am-sound.ru/884150091746sah0.pdfIn PDF document text
    • https://zuranuwazob.weebly.com/uploads/1/3/5/3/135332575/sotalakoxupewe.pdfIn PDF document text
    • http://anarchymedya.com/behavioral_theory_of_leadershipjp0qg.pdfIn PDF document text
    • https://vokipokulolobu.weebly.com/uploads/1/3/4/0/134016984/fodobozed.pdfIn PDF document text
    • https://nimijakis.weebly.com/uploads/1/3/4/5/134577625/nuvivivegipe.pdfIn PDF document text
    • https://suzotavuni.weebly.com/uploads/1/3/4/7/134765747/12100ba501.pdfIn PDF document text
    • http://arfeshome.com/charas_full_movie_hd3j2ao.pdfIn PDF document text
    • https://finirawex.weebly.com/uploads/1/3/2/7/132741073/dec009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422631/normal_6015bac83b644.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/a21b8d30dbebf.pdfIn PDF document text
    • https://fuvutefimege.weebly.com/uploads/1/3/1/4/131453053/aedbca5bd5fef.pdfIn PDF document text
    • http://trickyturkey.com/21903009879owa9l.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/385843ceb27735.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/daselex/66208750760.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD018 5676 bytes
SHA-256: 3e7219be281a99033dd4246bd70fe4788f11fb3b7abc60d7c261e29f0a738890
font_01_sfnt_off0000e37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37A 10196 bytes
SHA-256: 9dd1afa14369bdd690f61cefe2518563d6363a772438f167bc4ef74c574c7fa3

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