Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0ad4c218aaa1a8…

MALICIOUS

PDF

74.2 KB Created: 2021-02-16 22:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7173ac682f341a2dc7212d4e78130fb7 SHA-1: 26d6240420bfadf79a63dbf43b255a9462d80d6e SHA-256: 3e0ad4c218aaa1a844627b9f8be0f9a668399d2922deb0cb139f9ef6b3d5a807
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, with one prominent URL pointing to 'seumenha.ru/strik', suggesting a phishing or malicious redirection attempt. The ML classifier also strongly indicated maliciousness.

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 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://seumenha.ru/strik?utm_term=how+heavy+is+a+hoveround PDF link annotation
    • https://rolobidixogiru.weebly.com/uploads/1/3/1/6/131637372/89d73ec.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/thfstge/lutajuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_60159bd3a9b4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459914/normal_60221096e9661.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491169/normal_5fdde23b0b129.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383136/normal_60049a0d87cdb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rolaxaja.rf.gd/dyslexia_journal_articles.pdfIn PDF document text
    • http://wabalegawamiraj.rf.gd/80070300298.pdfIn PDF document text
    • http://bixifededas.rf.gd/shoegnome_archicad_22_template.pdfIn PDF document text
    • http://jagesaba.epizy.com/99989680669.pdfIn PDF document text
    • http://divepirat.epizy.com/scholastic_story_map.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/sizidolarodaf.pdfIn PDF document text
    • http://sulupajus.rf.gd/metewaros.pdfIn PDF document text
    • http://rijujala.epizy.com/chandrabindu_band_songs_webmusic.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_off0000e34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34A 5096 bytes
SHA-256: 42fa3b0ad2e0c37def388d07411456b7714b8be82db03e599531cf339101c281
font_01_sfnt_off0000f4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B0 11588 bytes
SHA-256: c2950cddcadcf87fa86f3dba66b899749e953e8b978d02243b6678feb2faee99

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