Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69066cb53f73746…

MALICIOUS

PDF

74.9 KB Created: 2021-02-24 10:06:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bf36cd4efc37933bd775054f2aaa113c SHA-1: b6f5c7dcda44ee260c566cbf74cc5b4baa3fa4e2 SHA-256: c69066cb53f73746c51e3ad06cf17b022b1a64d6b22f4c7075779271b7d338e9
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate malicious destination. The primary lure appears to be a 'free download' for a BMW X3 repair manual, which redirects to a URL containing 'strik' and a search term.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://baarspo.ru/strik?utm_term=bmw+x3+repair+manual+free+download PDF link annotation
    • https://mujekakuvegaxum.weebly.com/uploads/1/3/2/3/132303245/vajuxukutomesovi.pdfIn PDF document text
    • https://cdn.sqhk.co/rizavoxaje/jS1Mhb3/35030673403.pdfIn PDF document text
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/zejesozakijix.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/fjfmfgh/zififezinakowamu.pdfIn PDF document text
    • https://cdn.sqhk.co/niturunajik/S3Ohajj/thor_ragnarok_soundtrack_ac_dc.pdfIn PDF document text
    • https://putonikasobex.weebly.com/uploads/1/3/1/0/131070178/037e909.pdfIn PDF document text
    • https://cdn.sqhk.co/leribunopa/aiijh7P/bingo_y_rolly_videos_completos.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunaropiz/jefVhg8/xawonasategora.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/hvidOQl/2490225460.pdfIn PDF document text
    • https://nodarato.weebly.com/uploads/1/3/4/4/134487471/1181334.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/dWAjihO/99196370183.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/eQkjfgc/muzulu.pdfIn PDF document text
    • https://cdn.sqhk.co/nisisepolo/Nijijcl/49839193771.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/cJ7ijjf/bubble_spinner_2_whale.pdfIn PDF document text
    • https://silajawa.weebly.com/uploads/1/3/4/3/134339193/tabaxiw-burazetadagu-kaxepiretol-sepakawipitigat.pdfIn PDF document text
    • http://gesenimul.22web.org/57066913071.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://gasoxesa.rf.gd/21586676687.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/clinometer_bubble_level_pro_apk_full.pdfIn PDF document text
    • http://beruraxawiloga.rf.gd/gelasenusotesitibal.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/jagokepotejoxefozoro.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_off0000d9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A5 5184 bytes
SHA-256: b5db5e363e38057b52d2ae464bd8894492f1f1bb1288135a585053a811c80c2b
font_01_sfnt_off0000eb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB32 10820 bytes
SHA-256: 339e99bd68cf9f2fcca49cd8745b17328dac8d87602df53719c94d78ebcbcd46
font_02_sfnt_off00011036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11036 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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