Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a531bbabf4fe9d…

MALICIOUS

PDF

77.3 KB Created: 2021-03-07 20:37:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 24a59d66a855f7319565bd6254f425a0 SHA-1: a641702b055a4c0a8b5bce3ed515a91a734f3deb SHA-256: b2a531bbabf4fe9d69facf7fca182a1c27a660c6e3bf939b801503d0b5fa9d91
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/wix?keyword=google+play+answering+machine PDF link annotation
    • http://gejesixave.scienceontheweb.net/cannot_connect_jbl_flip_3_to_laptop.pdfIn PDF document text
    • http://13millions-warzone.store/octoprint_gcode_scriptscyzwh.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/data_structures_and_algorithm_analysis_in_java_3rd_edition.pdfIn PDF document text
    • http://lufexaxoxak.mygamesonline.org/is_omega_good_for_weight_loss.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5fdf12bb7080e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413693/normal_5fde5376cc3de.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/crooked_kingdom_collectors_edition_india.pdfIn PDF document text
    • http://keep-travel.com/822921911309nxhr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_6041bab33ee4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451047/normal_5fffcb085fffe.pdfIn PDF document text
    • https://fukimeremunosav.weebly.com/uploads/1/3/1/3/131379236/6545850.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/jodetikizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_6037e2c885d9a.pdfIn PDF document text
    • http://agent-ritual495.online/kekewevoperomenygcu.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/pleasure_without_conscience_meaning_in_telugu.pdfIn PDF document text
    • https://lipofodimeduwep.weebly.com/uploads/1/3/0/8/130813747/fomov.pdfIn PDF document text
    • http://letxxnx.org/mplab_tutorial_for_beginnersd9a8z.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/xunagowobetoneji.pdfIn PDF document text
    • http://lirebuwoke.mygamesonline.org/webovifosovotegukobuzalot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_602d54abaaf1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jezevenakos.myartsonline.com/muwebomemu.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_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 5572 bytes
SHA-256: 7c9c4d4a64c6fc0c7e3088677660da71ddf1a38da60f561b4588b689bfbcb044
font_01_sfnt_off00010458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 10476 bytes
SHA-256: 38565663dd7b1993377e182322334b93b029b1f6c3b8b155800018344c15a1b5

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