Malicious PDF — malware analysis report

Static analysis result for SHA-256 0baba699f0b09589…

MALICIOUS

PDF

79.9 KB Created: 2021-03-18 06:19:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b502cc9c16c65761b2cdba549247a679 SHA-1: e1eaea1dd3031a7f37ab62503db17e647617fd49 SHA-256: 0baba699f0b095895f3b798cd0b6089c3cff8dc45866d3c4d2e6c881b0586c9d
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/strik?utm_term=badger+1-83a+leaking
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/seruwonutijonixefe.pdf
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/sades.pdf
    • http://detonic-deutschland.website/true_story_of_the_three_little_pigst7e6i.pdf
    • https://razomidubijime.weebly.com/uploads/1/3/4/3/134395635/8a9466d35dad8c1.pdf
    • https://fasexunatosupa.weebly.com/uploads/1/3/1/6/131606354/zunokevosegew.pdf
    • https://bewogataxatux.weebly.com/uploads/1/3/2/6/132695278/xijirobukudunukox.pdf
    • https://sukodijam.weebly.com/uploads/1/3/4/5/134516983/diwetuxenus.pdf
    • http://bestsaleshopin.xyz/65370491113fy2lo.pdf
    • http://nowukusox.mypressonline.com/vikamotigegusezuxefujugi.pdf
    • http://rexonina.medianewsonline.com/present_simple_and_present_continuous_exercises_upper_intermediate.pdf
    • https://butadagawonor.weebly.com/uploads/1/3/1/0/131070306/rojireg.pdf
    • https://noxurawikatiner.weebly.com/uploads/1/3/1/1/131163986/belebidojel-jojapevilavuzaf-lufoxipotipitu-makisalulun.pdf
    • http://dommasters.site/what_are_other_words_for_long_time9mv1t.pdf
    • https://gugajapu.weebly.com/uploads/1/3/5/3/135330564/4657432.pdf
    • http://studytogether.fun/ley_de_wattdimjn.pdf
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/jupanegutufare-bikerel-lesevegan-verig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c3e068d8-c2fc-43a6-a392-7331984c6e43/rabbit_hole_legal_definition.pdf
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_bdd40e3358c44d35ad1bfad8c278f4a1.pdf?index=true
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_d9fe05e4bb7d42a8847b4e765366a927.pdf?index=true
    • https://uploads.strikinglycdn.com/files/931d6499-06f3-4b17-8b1a-fae9fab26f33/radokefebow.pdf
    • https://uploads.strikinglycdn.com/files/76988189-0fc0-481d-a149-af6934681366/how_to_create_a_stock_trading_strategy.pdf
    • https://uploads.strikinglycdn.com/files/1ed6e4b7-0699-4733-b3e0-6c6fe687b5fc/84070814263.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_off0000f6b1.bin
7324132c3093a663976cb5cca6f97d53049e9691e290653f1f2c0bdc5052737a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B1 5372 bytes
font_01_sfnt_off0001090f.bin
47754ce4283f1013fac3e66602e83073067778f53320790ad4814dd779d35452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1090F 11900 bytes

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