Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0248de2c5edf929…

MALICIOUS

PDF

77.7 KB Created: 2021-03-24 23:32:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5215df63b725530a810d30d86191c68a SHA-1: 790170ea1d936d183a5509637094ef1bbc2f3747 SHA-256: b0248de2c5edf9299fe2871626d1f862bca7f852facccadc4d3450f9fb19041b
186 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 high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be related to a printer issue, likely a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-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://jacksth.ru/strik?utm_term=why+does+my+canon+printer+not+print+black
    • https://roxejozojone.weebly.com/uploads/1/3/0/9/130969259/dekosa.pdf
    • https://cdn-cms.f-static.net/uploads/4489052/normal_604053185c0e5.pdf
    • https://zonozedu.weebly.com/uploads/1/3/0/8/130874021/cebd69c3cbf.pdf
    • https://cdn-cms.f-static.net/uploads/4454679/normal_603711e99aa4b.pdf
    • https://sesifubonimexa.weebly.com/uploads/1/3/5/3/135317238/2786955.pdf
    • https://sugodaxekot.weebly.com/uploads/1/3/1/8/131872070/gowerezila.pdf
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/16effffb412ad8.pdf
    • https://cdn-cms.f-static.net/uploads/4409616/normal_6057fed0a3caa.pdf
    • https://pugadaxalan.weebly.com/uploads/1/3/1/4/131437680/6601778.pdf
    • https://lotuwuwobegeze.weebly.com/uploads/1/3/4/4/134476082/lisum_tigamileseleg_vejekika_ponaza.pdf
    • https://static.s123-cdn-static.com/uploads/4458618/normal_60054cbc4cd88.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_0daeed604284473caa58ecd89953ade0.pdf?index=true
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_43376ab7a7fa474189a237798e5935b5.pdf?index=true
    • https://s3.amazonaws.com/bokofapig/85298333369.pdf
    • https://s3.amazonaws.com/sixenogafopoj/how_long_to_verify_facebook_id.pdf
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_91f8bb46f75549a88b0146973b070c7d.pdf?index=true
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_333de64fa76c45e99e40b8653985ea10.pdf?index=true
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_bc15a758d3974a919f8100f7d5e82441.pdf?index=true
    • https://s3.amazonaws.com/sesijesule/candy_camera_pc_online.pdf
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_a433e4ec3d4542fca223519bec41e682.pdf?index=true
    • https://s3.amazonaws.com/metakibeme/jowaref.pdf
    • https://s3.amazonaws.com/jobavo/dumelugoxur.pdf
    • https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_a07e64f7338749b99f7dede21de04b93.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_off0000eecb.bin
8ddeedd1af6ba9be5f64727fa74ecc6d5a655dc5553c85ce8674135045c0e43b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEECB 5632 bytes
font_01_sfnt_off000101d7.bin
1398252d969448dbdd939c7b0573e5417a7e8f0c7d058ab33f9fd58cde76ee1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 10992 bytes

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