Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c50a2913a888771…

MALICIOUS

PDF

86.4 KB Created: 2021-03-27 19:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 48f1a330b3f24c67cde0fa78b8d1cdbc SHA-1: ecf8f4f2a90fc19e1ec80f33165994b58dc533a2 SHA-256: 0c50a2913a8887716a219f8f6740f7333aaa3ee758dcce643a2bbd53304c78a8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for SEO poisoning or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=bridesmaids+full+movie+online+free+dailymotion PDF link annotation
    • http://ogranicbio.space/61574865518vdjq6.pdfIn PDF document text
    • http://esportzmlevent.com/app_21_poker_gameaozzm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_602fc2fda997e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476780/normal_5fe3650bcde88.pdfIn PDF document text
    • https://gipavenox.weebly.com/uploads/1/3/5/9/135966662/9940512.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/1051041.pdfIn PDF document text
    • https://xukonupuzifig.weebly.com/uploads/1/3/4/6/134621954/210b49c2638dfc.pdfIn PDF document text
    • http://flathead.us/sharkrf_openspot_3_review7chif.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/9823708213um7jz.pdfIn PDF document text
    • https://jisixeda.weebly.com/uploads/1/3/1/4/131409884/839b1a4050593f.pdfIn PDF document text
    • https://binenivav.weebly.com/uploads/1/3/4/5/134516867/3809793.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391921/normal_5ff2d5d01d6ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5fd9578c2d11d.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/4e1e5dcd445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_602ad7c0149a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_602d4775ab920.pdfIn PDF document text
    • http://mbfsopg.com/what_to_eat_when_planning_to_get_pregnantr4qvc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375353/normal_60058f7839f65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/redegelesibif/whatsapp_pc_window_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/59637543837.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/77917690612.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/sdcep_warfarin_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/how_to_clear_driving_directions_in_google_maps.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10651 5148 bytes
SHA-256: 4bd393d6cdc1cb7a286d45b8b2843289a0e99a6e09ebf94a414c86ae7434867b
font_01_sfnt_off000117c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C3 11316 bytes
SHA-256: 561e3add9d47cd1403c9bdcd9a04b5cb366dea06a03a66f376823bb533622f04
font_02_sfnt_off00013dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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