Malicious PDF — malware analysis report

Static analysis result for SHA-256 2219d111098a7c4c…

MALICIOUS

PDF

72.2 KB Created: 2021-03-28 02:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22482a79b6e0a2df51c6b76e706d6a22 SHA-1: 7c8745dd3da9ac383d65f7662b5fc7988cb5b571 SHA-256: 2219d111098a7c4cfb1c13970559784aaf205c4c14ddf7e820811e3107ed392e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains multiple external URIs pointing to potentially malicious domains. The PDF structure and embedded URLs suggest it is designed to redirect users to external sites, likely for phishing or to download further malicious content. No scripts were extracted, but the presence of external links is a strong indicator of malicious intent.

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://pelibifir.ru/wix?keyword=raze+unblocked+games+google+sites
    • http://fojefojegut.medianewsonline.com/60815450980.pdf
    • http://tujijamutibe.sportsontheweb.net/15031855123.pdf
    • https://cdn-cms.f-static.net/uploads/4371247/normal_6059b81e5f0db.pdf
    • http://dosijefa.mypressonline.com/wijorawidoxe.pdf
    • https://cdn.sqhk.co/padasagam/iaeXWdD/gmail_sign_in_for_business_accounts.pdf
    • http://mokemowowove.mygamesonline.org/bartlett_s_familiar_quotations.pdf
    • https://cdn-cms.f-static.net/uploads/4426955/normal_603b2f7be5646.pdf
    • https://cdn.sqhk.co/kozosorole/hehjgfb/sigabuvirusaponifafijezi.pdf
    • http://kuboduzuke.mypressonline.com/rutanizupurokizurapek.pdf
    • http://saroforati.medianewsonline.com/dakuz.pdf
    • http://dujojiwasemob.mywebcommunity.org/certificate_format_free.pdf
    • https://cdn-cms.f-static.net/uploads/4484156/normal_602217a34a143.pdf
    • https://static.s123-cdn-static.com/uploads/4470830/normal_5fdf7a5cc8ddb.pdf
    • http://vumajuzatijerak.getenjoyment.net/51257570449.pdf
    • https://cdn.sqhk.co/xadeviro/g4zHeNh/cisco_rj45_to_db9_serial_console_pinout.pdf
    • https://cdn-cms.f-static.net/uploads/4414849/normal_60417c2e46e31.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8354ad01-8a0c-4215-be04-54d9e280a70a/how_to_find_the_missing_angle_measures_of_a_polygon.pdf
    • https://uploads.strikinglycdn.com/files/c5e9ec0f-b9e0-42bf-bced-1708fd985369/bright_starts_swing_battery_replacement.pdf
    • http://jiwositefikeb.rf.gd/cadette_woodworking_badge_requirements.pdf
    • http://zelupuvafi.epizy.com/xelaveberubefozeji.pdf
    • http://kapowuxivi.atwebpages.com/13313591464.pdf
    • http://pevojaxako.rf.gd/the_joy_luck_club_book_synopsis.pdf
    • https://uploads.strikinglycdn.com/files/dda01b3a-e760-4cb0-9393-404fe5a7ff12/maze_runner_the_scorch_trials_4k_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db03.bin
6a62d78b25f2566afabc47ed64c08d2a75cb457a2a874f6d797e7b5489eb5106		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB03 5424 bytes
font_01_sfnt_off0000ed76.bin
346e0cf033f138405bfc8531efffcb71bf225f5546842b36b30a9f9e512fd1be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED76 10548 bytes

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