Malicious PDF — malware analysis report

Static analysis result for SHA-256 1337bd7f4dfa8c47…

MALICIOUS

PDF

71.4 KB Created: 2021-03-18 22:29:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 09a0e9d7562fb5ebdd0e811dc785fd97 SHA-1: dbeeef11f80db0ab9194e0d049e3beb0b45e757c SHA-256: 1337bd7f4dfa8c470e5b956b16f043acd88187c3b1f542a913eda1a9b36911ff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'seumenha.ru'. The document body, though heavily obfuscated, suggests a lure related to device reset instructions, which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://seumenha.ru/strik?utm_term=how+to+factory+reset+neato+d5 PDF link annotation
    • http://uspeh.icu/kexunosusa40wk3.pdfIn PDF document text
    • http://gelokan.sportsontheweb.net/2020_vw_beetle_owners_manual.pdfIn PDF document text
    • http://docita.fun/ligojigumigaxaxabufml7m.pdfIn PDF document text
    • http://reduslim-europa.site/liftmaster_model_877max_troubleshootingmat4t.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/moralistic_approach_in_literature.pdfIn PDF document text
    • http://max-lifting.store/free_editable_funeral_program_template_word3bu3e.pdfIn PDF document text
    • http://help-ruleviolation.com/392679009283u0ia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e69e239-e228-4158-a406-7c0191ed1574/99140991455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b24d4d9-4b53-432f-8c6f-7832f5157118/39180852414.pdfIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_b318a1ee965a47d299cf6cae957ba32f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45accaec-6a21-4dbf-bc93-9629f0042355/sharp_aquos_70_inch_tv_specs.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_8e87d8d6f302482c902f2edd0daf4e78.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3626580d-f1c0-4e4b-8599-484fd996d2e5/tikonogebajumobuzimak.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/40276163482.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/35277685670.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/infographics_template_psd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/alcatel_lucent_ip_touch_4018_user_manual.pdfIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_be9ca99dc6654ef1aa9d56194db22740.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/73dd2bd3-36fa-47e1-a374-ca6d92f2037f/madivibaxofiwolakosetanet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB70 5260 bytes
SHA-256: f6da8d5a3c7f245433e096f0d94fd662bb6af4cfc2dd60ddb5f662c2fbced4f5
font_01_sfnt_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 10300 bytes
SHA-256: 70b199fe7e123b679afac0ece5787629ecbead46806f67810dc421de2ce6ab14

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