Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4c0cec4d9dfdc7…

MALICIOUS

PDF

82.8 KB Created: 2021-04-06 17:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 75cc136a9f03df9e4d1072967dd672c9 SHA-1: 4b28e3fdb4694c97462a463a7174b3628c19a84f SHA-256: ff4c0cec4d9dfdc7c16aaa4d07c8cfde27725a281e21e22b2b52463c8da8d23e
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to a 'Simpson power washer 3200 manual'. No scripts were extracted, but the presence of many external URIs suggests the PDF is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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://fokemale.ru/strik?utm_term=simpson+power+washer+3200+manual PDF link annotation
    • http://x-bionic.shop/niwakijexowalghx00.pdfIn PDF document text
    • http://bahis-sikayet.com/2018_honda_cr_v_touring_owners_manual1lzq3.pdfIn PDF document text
    • http://burrrhey.tech/346082676151kjlz.pdfIn PDF document text
    • http://everydays.space/85384547690j6ulq.pdfIn PDF document text
    • http://wide-take.top/sovofowurusimotol7g0gv.pdfIn PDF document text
    • https://wulelosen.weebly.com/uploads/1/3/5/9/135992808/8308115.pdfIn PDF document text
    • http://goproonly.com/differential_manchester_encodingeqaop.pdfIn PDF document text
    • http://wide-mean.top/averaging_methods_in_nonlinear_dynamical_systemsbnpal.pdfIn PDF document text
    • http://italysummer.fun/types_of_visual_aesthetics9il48.pdfIn PDF document text
    • http://yesstore.pro/150127271911w8xm.pdfIn PDF document text
    • http://osthondroz.com/checkbook_balance_form6wjzy.pdfIn PDF document text
    • http://mamontov-net.cc/23109201546vznv4.pdfIn PDF document text
    • http://wei-nmvc.com/40024026882tcr7q.pdfIn PDF document text
    • http://topcabinets.xyz/kmspico_windows_10_activator_free8k3ps.pdfIn PDF document text
    • https://jekosupoma.weebly.com/uploads/1/3/1/6/131637113/wizoninolexiles.pdfIn PDF document text
    • http://mexicotop.xyz/51672713508nh5zd.pdfIn PDF document text
    • http://maleev.online/414091810677zae4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lunofalogejutu.epizy.com/c_function_template_specialization_in_cpp.pdfIn PDF document text
    • http://zugujegezamuto.epizy.com/86856947359.pdfIn PDF document text
    • http://rimamosapike.epizy.com/48576069059.pdfIn PDF document text
    • http://wegefug.rf.gd/gegixitararobop.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000123ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x123ED 17372 bytes
SHA-256: 4c2597c73115df032056da3b3df900afc015bc5e48779fb28fd04f1e79afc327
font_00_sfnt_off0000e7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 5692 bytes
SHA-256: e752393dd5d1564eafeebac0c1d71f214f32be5a81a4458dc15e7e4cccddc4f7
font_01_sfnt_off0000fb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 11976 bytes
SHA-256: 44419c87819ae363b9f7a444a2d38a57adf971d63b5a56c88bfe52c936bfcd55

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