Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f512d1fccea155…

MALICIOUS

PDF

77.0 KB Created: 2021-03-09 19:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e8c7d064eb626d76906bb9790f69f236 SHA-1: afea6795a21fc783ab2a6aa66c5d5c01819b7df6 SHA-256: 32f512d1fccea155f1d89b479d7093995ff071a8dc149dceb60ab78fb329d83c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a significant portion pointing to disposable hosting and acting as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the final destination, likely for phishing or malware distribution. No scripts were extracted, but the presence of multiple external URIs suggests the document's primary function is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://nipisod.ru/aws?utm_term=what+is+the+cans+assessment+tool PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368950/normal_602e3da975554.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/j1Myhcv/pictoword_level_532.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_600d95f32ed82.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/jESjiif/tech_craft_automation_chattanooga_tn.pdfIn PDF document text
    • http://nagonakog.22web.org/barbarian_druid_5e_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/ihagjil/xuvagom.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/g60r4l0/virus_hunter_island_glitch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_601867fac715a.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/23jaehg/messi_free_kick_vs_liverpool_champions_league.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501046/normal_602ee4d4c3de2.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
    • http://fefisapuvekebi.epizy.com/48221147336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c0d0c7e-0c3e-4815-939e-e7541340c8b6/my_grandma_got_run_over_by_a_reindeer_movie_songs.pdfIn PDF document text
    • http://ligixuz.rf.gd/dovezitomumasesigilovu.pdfIn PDF document text
    • http://pakidenekarudi.epizy.com/carol_ann_duffy_anne_hathaway.pdfIn PDF document text
    • http://mibexaluji.epizy.com/grammarly_apk_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da6b999e-edb8-4636-a315-556ce789c5de/how_to_study_physics_fast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a4a5ba-386a-4565-8156-f1db9e5d3940/israel_kamakawiwoole_somewhere_over_the_rainbow_ukulele_tutorial.pdfIn PDF document text
    • http://suwapazuxesara.epizy.com/avatar_english_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a5d1e3-e024-4af1-991f-76ace7b10cfd/66660872999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02bafd1-dfd6-4e2b-b96e-2ba362d1cc84/pitch_anything_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04129e8e-88f0-4c9a-bf26-da563102bb93/how_do_you_know_when_evod_is_charged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ff9cf4-92be-452a-badf-dba8d4425788/19155674527.pdfIn PDF document text
    • http://wanezezigemos.rf.gd/sinedita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4fea900-26e7-4dea-b649-cab245680d53/30369204212.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_off0000e266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE266 4744 bytes
SHA-256: 86969f63bd8f86572f942ad2d4fd52e6b60061d0db88a65a11cb38083fe78689
font_01_sfnt_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 10716 bytes
SHA-256: 098f91bfa5934c3c922a98f657f9c2f461548277b9e89f64bc2ff26e45db14dd
font_02_sfnt_off000116f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2