Malicious PDF — malware analysis report

Static analysis result for SHA-256 349cbe19c2996095…

MALICIOUS

PDF

69.8 KB Created: 2021-03-19 12:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6004b552c4a55b009d878d7d5e98a373 SHA-1: bdc334569702fde75580e4555b7fee4dd7d730b2 SHA-256: 349cbe19c2996095279c99bdd92dff97eb3198e51ca9423f7a159e70c6929222
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 0.9998

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=aircraft+maintenance+technician+jobs+in+uae PDF link annotation
    • https://jemogofeti.weebly.com/uploads/1/3/4/0/134042608/3949572.pdfIn PDF document text
    • https://dijajogid.weebly.com/uploads/1/3/0/8/130874349/7546530.pdfIn PDF document text
    • http://nebo-baikala.ru/ibn_arabi_ertugrul_ringtonevvvpq.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/semonidukidupo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444378/normal_60085cffe7650.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368975/normal_5fef1878a113d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_5fd18dce14e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_605338b8ce4e0.pdfIn PDF document text
    • https://zibozofebar.weebly.com/uploads/1/3/0/7/130740265/kovebejevubazoxu.pdfIn PDF document text
    • http://health2health.online/assistir_manual_de_sobrevivencia_escolar_do_ned_dubladozihy8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_c118b5bf9cca4e66917d969d6c15eb35.pdf?index=trueIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_774740088cec43cbbd19ee7a5d607b9e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b9a3db-c56e-401f-a629-94aa44474ee5/rixitugef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de7e7426-9450-424e-b6a4-a809fd790776/datojufixosu.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/mayabazar_kannada_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/cf_auto_root_g610m_android_7.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/gewanagen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edabe3de-6c43-4fa4-8897-175d61406939/41928258468.pdfIn PDF document text
    • https://13dbc848-c95e-4197-a439-3ae2050b6ee2.filesusr.com/ugd/46bbe5_eb52cce52e6c4290ac816bd157887ff4.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC708 3044 bytes
SHA-256: 077c9d1f363836090044d8ec301bdccd8b8f2633f8e7cad60cdae01df5771239
font_01_sfnt_off0000d1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DC 5292 bytes
SHA-256: 4d5d259da4682526bee393a89151c1abc4fbe2a59d245c430f3f1779f105d5d5
font_02_sfnt_off0000e3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 10488 bytes
SHA-256: 88b5166aa09c88f2878059762fb27944bf6bc968a636d17d654de2a3c472c3e5

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