Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d58b765d68d846…

MALICIOUS

PDF

79.2 KB Created: 2021-03-04 23:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ae480a59b8ab7fba32c7201549cd59a SHA-1: b6ce3eda361b9caed38813034b301fd6b1007307 SHA-256: d0d58b765d68d846fcab0f9d5ddf1471619e2283ad4547eb4c4f694817750418
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of malicious activity, likely leading to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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
  • 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://golowaki.ru/123?utm_term=subway+menu+usa.pdf
    • https://cdn.sqhk.co/subilikiwi/c6aiehC/56461515526.pdf
    • https://cdn.sqhk.co/dabekojov/xqgeljb/democracy_meaning_in_english_kannada.pdf
    • https://bigifami.weebly.com/uploads/1/3/1/4/131407708/4068467.pdf
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/jaderolup-rajozexej-wabijewa-fufedapofug.pdf
    • http://sagunutu.medianewsonline.com/66794297164.pdf
    • https://pogefaduvo.weebly.com/uploads/1/3/5/3/135391099/dd7546702d26.pdf
    • https://vagapirub.weebly.com/uploads/1/3/4/6/134648019/lujiwojapezus.pdf
    • https://cdn.sqhk.co/nutewakizi/jageghY/jivogarilijaboful.pdf
    • https://cdn.sqhk.co/jegamaxegev/driiheT/73611665807.pdf
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/7755006.pdf
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/4682688.pdf
    • https://cdn.sqhk.co/vibisidumes/ijjhicR/26805223423.pdf
    • http://laluwaraselolar.mywebcommunity.org/waguzorujuwoselabukes.pdf
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/sopapebajime-worarug.pdf
    • https://fobedixosofano.weebly.com/uploads/1/3/4/3/134377241/jinobesajagegugix.pdf
    • https://rugepokowefi.weebly.com/uploads/1/3/5/2/135294276/d479f32c67a779.pdf
    • https://vukuzimina.weebly.com/uploads/1/3/4/1/134109202/fa11e721ff7e99.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_db16aea30e24434ebe8c4a10efeb121a.pdf?index=true
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_cbbf5fc973244ef3b95ebf4c12154a79.pdf?index=true
    • http://zitadufafasid.onlinewebshop.net/sejakaj.pdf
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_7faaf4ff26bd40fab0eac0d6315f872e.pdf?index=true
    • https://33fe1336-4051-433c-b691-b763732126dd.filesusr.com/ugd/6c8f37_1eecc5de880645a389c9569e631926e0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe8.bin
83d6308288de87fc7b54d19cb7077c1d17ebdb4ee24d42c62b823fc5611c0880		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 5172 bytes
font_01_sfnt_off0000fd73.bin
132ccda0e2a5ba0a37d87139de477f46d66c9478df4b47a988b110cb30a972ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD73 10572 bytes
font_02_sfnt_off00012175.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 4324 bytes

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