Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4502a7c9d6c76b…

MALICIOUS

PDF

73.0 KB Created: 2021-03-13 16:19:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aec2dd294b8de5cfc7fb00a37f0906e9 SHA-1: e305df52e730d1425d919f1c75159ff26b7cd253 SHA-256: bb4502a7c9d6c76b63884498af13c30e20ec0699b0085a8873ac2b765ef0636e
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to downloading software, specifically mentioning 'Euro truck simulator 2 free download for android'. The presence of multiple suspicious URLs and the link farm heuristic strongly suggest this document is designed to redirect users to malicious sites for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/aws?utm_term=euro+truck+simulator+2+free+download+for+android
    • http://stikc.xyz/lalutananaveju65smm.pdf
    • http://timecodes.net/how_to_flush_mercury_9.9_4_stroke3y7r1.pdf
    • http://bogplaktnc.fun/how_to_install_brother_dsmobile_720d452er.pdf
    • https://cdn.sqhk.co/porodiwaten/cJX0uvZ/paxugi.pdf
    • http://zahlungsservice-ch.site/contoh_surat_permohonan_pencairan_dana_jamsostektafmk.pdf
    • http://nuverlites.online/mcpe_horror_maps_with_jumpscares_multiplayerewhgi.pdf
    • https://cdn.sqhk.co/sixerusesebu/gichdC0/10175552997.pdf
    • http://nicepics.xyz/fabijutubuwealq.pdf
    • http://vumogegotawugub.mypressonline.com/jutubupinunofe.pdf
    • http://bbflowers.net/life_and_death_twilight_epubq2hqr.pdf
    • http://qunit.space/vefunisolujfemd.pdf
    • http://agent-ritual495.online/88358946538sud7y.pdf
    • http://lamanixumerad.mypressonline.com/best_physics_textbook_high_school.pdf
    • http://redita.fun/lagu_ajarku_berdiam_dekat_dihatimuk78h3.pdf
    • https://cdn.sqhk.co/rosisole/0dih1jd/57151830861.pdf
    • https://cdn.sqhk.co/sekigizakeku/jgiSEcc/electro_dragon_army_clash_of_clans.pdf
    • http://navaram.online/67537614443cteqj.pdf
    • https://cdn.sqhk.co/fulaxanew/MjicifX/spacex_capsule_landing_video.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_62c99df88fb54aec8a3247f4ac4e5c72.pdf?index=true
    • http://ximuxulizi.myartsonline.com/39295945138.pdf
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_b3831ea9190849fea9f6147e25e23fc7.pdf?index=true
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_28d6462ecd6e4f43b301fa5d22256929.pdf?index=true
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_53869213ac374d53a761a5d460c67f5c.pdf?index=true
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_be52f624f2864415a07d557c04b86338.pdf?index=true
    • 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_off0000db7f.bin
879c5dd96e6c1caff1da5993a16172fb5723961b40df0a44181d0f4f4c1e11fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7F 5412 bytes
font_01_sfnt_off0000edec.bin
48095179177f77c6b288d8499722687b4ae3de13adcc77aac89aca4382448d87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 12180 bytes

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