Malicious PDF — malware analysis report

Static analysis result for SHA-256 16638a0b53393e68…

MALICIOUS

PDF

87.7 KB Created: 2021-05-01 23:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eb6e9424358b94f27f3a0c7f3e43d5fb SHA-1: 202675dd2a2565678523478ce7f19064c3a1db9d SHA-256: 16638a0b53393e6887920f144c8093d936129f68277477a48cfb93a9a336dc67
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9993

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
  • 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://ponafet.ru/strik?utm_term=audiveris+the+open+source+pdf+to+musicxml+converter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382405/normal_5ffddc1600186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6035c05be196f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_602bed5ab4f36.pdfIn PDF document text
    • http://jikalananigopun.iblogger.org/83922221373.pdfIn PDF document text
    • http://voicebftyi.com/have_yourself_a_merry_little_christmas_chords_christina_perri1zq89.pdfIn PDF document text
    • http://zoxulojiliboro.22web.org/64541284294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369779/normal_5feb289467a73.pdfIn PDF document text
    • http://mizeveba.22web.org/50080404430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489988/normal_605300c025766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459323/normal_6062efec0ea26.pdfIn PDF document text
    • http://medgaj.com/aaru_movie_songs_comuc6tx.pdfIn PDF document text
    • http://xusakarezexalu.iblogger.org/18882340300.pdfIn PDF document text
    • http://trokot-online.xyz/fomabadevorosepukobezirjtcg6.pdfIn PDF document text
    • http://gipoletuzemixol.iblogger.org/26263656010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419642/normal_5ff8cbc7377ce.pdfIn PDF document text
    • http://sodahub.pro/why_is_my_logitech_m570_mouse_not_working2j0bj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486353/normal_605c39f42e768.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabaxonewopux.epizy.com/bunogiziw.pdfIn PDF document text
    • http://pugonekiwijotom.rf.gd/xerufugig.pdfIn PDF document text
    • http://lalavuzotijosi.epizy.com/al_quran_only_urdu_translation_mp3.pdfIn PDF document text
    • http://ketolunumakomez.rf.gd/73563601735.pdfIn PDF document text
    • http://fefugadabojenip.epizy.com/honeywell_thermostat_th5220d1003_installation_guide.pdfIn PDF document text
    • http://waketekedoveke.epizy.com/vavete.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_off000119bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BD 5300 bytes
SHA-256: e5487f3cfb294d871ee7ef24bfc01d987f36add8ec42ddda32cbcfc140d2e10f
font_01_sfnt_off00012bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAD 11056 bytes
SHA-256: 8c1ca0aa8d3f24fbad2f92e6b401154dd200b015f49319f92597836afc7e336c

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