Malicious PDF — malware analysis report

Static analysis result for SHA-256 8944eadac82fcca5…

MALICIOUS

PDF

83.9 KB Created: 2021-03-09 17:15:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 95a142125dc63623729807dbf1ca1b55 SHA-1: 78aead17e5c98edbb8c12313848c618b1bbfed88 SHA-256: 8944eadac82fcca53983168173ea81df3d165c80791b975e597d46b9c509da82
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 numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to search terms, suggesting a phishing or redirection attempt. The presence of external URIs and the link farm heuristic indicate a likely attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=best+diaper+genie+for+dogs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406809/normal_602c89a21cfc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489977/normal_601e724f8ef53.pdfIn PDF document text
    • https://cdn.sqhk.co/gewigerajoru/hchchci/42114568922.pdfIn PDF document text
    • http://plusstore.pro/vatutopofifuzon6hwb.pdfIn PDF document text
    • http://mmmmmme.space/jquery_append_form_data9q7ph.pdfIn PDF document text
    • http://nekretnine.site/vipadanazc14sr.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/walekakaxan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_6041823a432bc.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/harry_potter_2021_calendar_printable.pdfIn PDF document text
    • http://varietystore.website/potaxob7r661.pdfIn PDF document text
    • http://ufenmac.com/bootstrap_3_checkbox_form-_group4qilc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_6041bfa008a47.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/iPijpif/gridiron_guys_roofing_complaints.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/adwtxOg/christmas_events_today_in_houston.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456996/normal_602aa9ee75cf9.pdfIn PDF document text
    • https://cdn.sqhk.co/gulidepiz/iejjjhf/78721273311.pdfIn PDF document text
    • http://memisada.mygamesonline.org/59936925383.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/xufoxorog/2003_cadillac_escalade_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/arroceria_formentera_madrid.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/dobokomavuj.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 7

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_off00010b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B07 5224 bytes
SHA-256: c5b24475fdbae52711d1e79a6862c0d9c1ae8c4d86572e19f6b36fe07b8bcb1d
font_01_sfnt_off00011ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE3 11028 bytes
SHA-256: 80a97fdb782afd1fbfaa91e1d830bc6b5fdb923c9ad5b8a4b29bbca256c24a9d

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