Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0352a5b7ce3b64…

MALICIOUS

PDF

76.6 KB Created: 2021-03-27 14:09:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 564fd0b18a3122d4e8b086828c7dd764 SHA-1: 691eecaa8e2a00acb124f577f087f82103397f2f SHA-256: 9a0352a5b7ce3b64d1bcab89ce5b019bcfbc7174ea9e0d7a0437e58230db583b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a domain associated with link farming and potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the heuristics suggest this file is part of a phishing or malware distribution scheme, likely using a spearphishing attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/award?keyword=girl+in+pieces+kathleen+glasgow+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443588/normal_602c9d503b498.pdfIn PDF document text
    • http://benaletuzulug.sportsontheweb.net/47471610866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463529/normal_602d71fea9b8e.pdfIn PDF document text
    • http://bobezib.22web.org/arduino_uno_pinout_diagram.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/how_to_program_baofeng_uv-5xp.pdfIn PDF document text
    • https://cdn.sqhk.co/zuwiwejagub/hdjiien/ufc_match_schedule_today.pdfIn PDF document text
    • http://puwinowelin.medianewsonline.com/dipoku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468571/normal_6003761c46a77.pdfIn PDF document text
    • https://cdn.sqhk.co/junikesiza/yZnkTjg/35400620749.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/exceptions_to_the_octet_rule.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/zupenafud/crown_ce1000_schematic.pdfIn PDF document text
    • http://minivenema.atwebpages.com/2020_lincoln_aviator_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/mipudavixogarag.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/how_to_say_nurse_in_spanish.pdfIn PDF document text
    • https://a16eeaf1-ab09-4fb7-bdbc-3ebfa24c279d.filesusr.com/ugd/03042f_e0329757beee4a45a1c255eb609b5828.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/66380478225.pdfIn PDF document text
    • http://mevumum.epizy.com/50573187992.pdfIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_2a0a0f8a7de943a3b521088ac9f65ca5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/61971076927.pdfIn PDF document text
    • http://suxovonoza.rf.gd/kubiniturejoxiviwan.pdfIn PDF document text
    • http://lojemavipaxike.epizy.com/58055346119.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_off0000ea17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 5604 bytes
SHA-256: 7eaf23c40dfe52219025c701c6d95b56e963e40448b543294910adeafa5d8f52
font_01_sfnt_off0000fd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD39 11616 bytes
SHA-256: 0bd93797ca87993cde608567581e50615e1ad959981b2f1672acaad365a38022

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