Malicious PDF — malware analysis report

Static analysis result for SHA-256 140a16cd590ec390…

MALICIOUS

PDF

82.2 KB Created: 2021-03-18 09:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b92be5b7344df2a4aac173441b88a44 SHA-1: 75b28870bb82af3f130f7cd2b37a322d2c8cc300 SHA-256: 140a16cd590ec390d553255dd22332fa06683a666a79d406f2f8e050f17a4f09
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The document body references "Clash of Clans hack cydia 2018", indicating a lure for potentially unsuspecting users. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

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://nipisod.ru/wix?keyword=clash+of+clans+hack+cydia+2018
    • https://cdn.sqhk.co/sebazisop/diVjfgf/disney_character_app_icons.pdf
    • https://cdn.sqhk.co/zamupefa/ib0k4hd/you_amaze_me_lyrics_gaither_vocal_band.pdf
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/6f0de9.pdf
    • http://tolunisusij.22web.org/difference_between_system_software_and_application_software_in_points.pdf
    • https://mikuzowadakan.weebly.com/uploads/1/3/1/3/131383480/weliteberaxoxum.pdf
    • https://tefajarusi.weebly.com/uploads/1/3/0/7/130775660/76d585e6cc.pdf
    • https://cdn.sqhk.co/norowitidot/0gcfhgk/motibagigavatotonu.pdf
    • https://radalumimobexod.weebly.com/uploads/1/3/5/9/135957078/ronarita-keluzidopap-babofowokipaj.pdf
    • http://paselon.getenjoyment.net/elitebook_6930p_battery_price.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zexukojol.rf.gd/almena_method.pdf
    • https://s3.amazonaws.com/rawesaragegugar/24532605635.pdf
    • http://butexageteril.rf.gd/payday_2_blt_mods.pdf
    • http://temitugefowe.epizy.com/a_handbook_of_literary_terms_amazon.pdf
    • https://s3.amazonaws.com/xakajoziwibi/basirasex.pdf
    • https://s3.amazonaws.com/xoguwavosuje/mora_minority_scholarship_form_2018-_19.pdf
    • http://rususekobijo.myartsonline.com/dotajisogisorudesagif.pdf
    • http://wuniwivufe.rf.gd/xijitulumizetozufijem.pdf
    • http://jibukut.epizy.com/46453319849.pdf
    • http://kimoviranonaf.onlinewebshop.net/american_girl_doll_houses_at_walmart.pdf
    • 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_off0000fce7.bin
3021c07b013d6c26712605c36cc83d2f91b9a9a876ac8ef97e9250baa724b7d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE7 5604 bytes
font_01_sfnt_off00011001.bin
c29feaedbb51ea269b1c32d9883a275e95c80bbf624fa2c34b7c0e4531bf42b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11001 13336 bytes

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