Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58bdc6e00ff8cb6…

MALICIOUS

PDF

76.3 KB Created: 2021-02-25 15:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dcb5c547613b6fdac0c6273946e04e50 SHA-1: 52771124219d6954e10bb9c924258156795ab68e SHA-256: a58bdc6e00ff8cb6b93754ca69492074071e62959cd7bd79659cda8772c4cc86
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs that redirect to external websites, one of which is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to license renewal, suggesting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9610

Heuristics 5

  • 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 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/award?keyword=how+to+renew+my+license+by+mail PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369802/normal_60086907f3f37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450898/normal_60308cfeca882.pdfIn PDF document text
    • http://artyom.guru/past_tense_and_present_tense_worksheets17xtl.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/awgdhf4/kezakobizatajimux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5fd1b18dbf3d7.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/vevesesekug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402014/normal_6016bf4008016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_60275e332ea55.pdfIn PDF document text
    • http://mgacessoria.online/molijukiravusixonoxu45phw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377095/normal_5fdd957397770.pdfIn PDF document text
    • http://custits.space/free_alphabet_tracing_worksheets_a-_ztevy4.pdfIn PDF document text
    • http://podcard2020.site/bavevawajoxazexojodiwiln1kpc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_602f5f1c71781.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nukilaba.myartsonline.com/17_day_diet_cycle_1_grocery_list.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/2968844893.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/61843460070.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/rakozedovumam.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/18791580496.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/15638727868.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

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_off0000f95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 5240 bytes
SHA-256: 98867a42192f5e7b351bae66d250649ed7220dcfe87e37f5df60b68a6c50c9aa
font_01_sfnt_off00010b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2A 10428 bytes
SHA-256: 977986ce089a97aa376795e28e0b399b588e9164665720045e141e2d95aed53a

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