Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b350d74cc38ecd2…

MALICIOUS

PDF

74.6 KB Created: 2021-03-03 12:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 95ea49c5ef4bc3beaab815e4c8a73259 SHA-1: ec0d5c88c9b6c2651616c16a4515e5c050fe5d55 SHA-256: 7b350d74cc38ecd26765dc50fe0c783b2cae861fd0927e8ca22017b28c49b5a8
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://fokemale.ru/strik?utm_term=can+you+put+vinyl+stickers+on+wood PDF link annotation
    • https://cdn.sqhk.co/dudugetogi/7PYahjU/samizemelurezavoboxelalu.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/igcczWE/miromar_outlets_hours.pdfIn PDF document text
    • http://mushygushysayings.com/skins_2017_movie_soundtrackeovq4.pdfIn PDF document text
    • http://fherixq.com/zafutsdt98.pdfIn PDF document text
    • http://lerasusakibura.22web.org/civilization_android_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_5fd31b9736f09.pdfIn PDF document text
    • http://my-credit.info/wevoxovagr4pt3.pdfIn PDF document text
    • http://kulanefimolon.mypressonline.com/zisojomogazowodivimojabip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460970/normal_6033339c96b2f.pdfIn PDF document text
    • http://astrology-personal.online/mukewey981.pdfIn PDF document text
    • http://nuzovofevaduw.22web.org/74583075261.pdfIn PDF document text
    • http://weareanonymous.org/what_is_pioneer_appradioyt3md.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulikoviluxugu.rf.gd/agri_college_in_coimbatore_application_form_2019.pdfIn PDF document text
    • http://gototura.myartsonline.com/susuxatanudugi.pdfIn PDF document text
    • http://gajivibuk.rf.gd/26053624502.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C2 5292 bytes
SHA-256: 7346fca823b9860980b421f4db875872f148bb95884db0e66e39285af50bbb2c
font_01_sfnt_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 11832 bytes
SHA-256: 8f25de7daf42232e3b94a7065c020372e58c3b7200eca9d7446d15526c95a14f

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