Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad4375473f86de7…

MALICIOUS

PDF

146.5 KB Created: 2021-02-27 07:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 62439953c3dc8a38855c0d879d72a468 SHA-1: 8742ca328b2cfb19a3bc287342da803fe125cb23 SHA-256: aad4375473f86de733df53395f692e89a0cd382266406cc068dbfe5fa0dd84f5
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains, indicating a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains a reference to 'treaty of fort laramie' which is likely a lure to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/aws?utm_term=what+were+the+elements+of+the+treaty+of+fort+laramie PDF link annotation
    • http://nusowutevu.getenjoyment.net/nugusimunuzikibape.pdfIn PDF document text
    • http://recepty-dd.info/bevebixomofubejakuxiavlnq.pdfIn PDF document text
    • http://evromotors.net/acfi_6_cognitive_skills_assessment_formhmsga.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/autocad_3d_building_dwg_download.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/sharp_xe-a207_cash_register_programming.pdfIn PDF document text
    • http://waystep.site/action_3d_telugu_movie_video_songsx5vcc.pdfIn PDF document text
    • https://torurukiruxo.weebly.com/uploads/1/3/4/5/134529807/6558401.pdfIn PDF document text
    • http://dozawudefe.iblogger.org/resume_template_microsoft_word_copy_and_paste.pdfIn PDF document text
    • http://penageli.getenjoyment.net/74341013162.pdfIn PDF document text
    • https://cdn.sqhk.co/pasudajuwesa/iatigVd/xozusejivitimewu.pdfIn PDF document text
    • https://jefabulovonaju.weebly.com/uploads/1/3/1/4/131438419/57969.pdfIn PDF document text
    • http://reduslimer.website/pikekoberizororusibizaxav90qp.pdfIn PDF document text
    • http://komarovskii.xyz/tumobuvawoxub8bgi.pdfIn PDF document text
    • http://vashmaster.info/how_to_determine_change_in_position_from_a_velocity_time_graphq73fa.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/us7RRgi/vovekakadoke.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/ihhhcBg/6326830849.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zawuzujuw.epizy.com/wafomerorajatu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002050e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2050E 5212 bytes
SHA-256: 2c30cf69819d024a6f974d800f20d9922c08fb95701b2a0b251e0f2b9883416a
font_01_sfnt_off000216ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216BA 11072 bytes
SHA-256: e156d2fca1d0513228208c50839a55b82ee9446f46a3960cb04a92f1124b627a

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