Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d9933bad247b41…

MALICIOUS

PDF

82.1 KB Created: 2021-04-04 20:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: f42ffd19d8efc943057eaff1d767fee8 SHA-1: 50b1b537126a332c0de8a7071bb17a132fb8d2c5 SHA-256: 32d9933bad247b41065cec5533177fc1d339bcb5f046a4d3bc04567c00c2381b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which point to disposable domains and are presented as download links for various documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/award?keyword=bio+data+format+pdf+free+download PDF link annotation
    • http://zoo-taxi.site/boardworks_science_chemistry_ionic_bonding_worksheetqur50.pdfIn PDF document text
    • http://help-bluebadgecenter.com/71730177278ahg4g.pdfIn PDF document text
    • http://eurostore.info/4856542198aatgk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500911/normal_60093e8418ace.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/GhgjjjK/37084231490.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/hgpUuhd/download_game_last_arrows_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_603eaefc0cb67.pdfIn PDF document text
    • http://firstsecu-paypal.com/833757651453jfiv.pdfIn PDF document text
    • http://bridgecommerce.com/90454571473jgjmr.pdfIn PDF document text
    • https://cdn.sqhk.co/rewanizotaj/giagdie/zombie_outbreak_simulator_apk_android_oyun_club.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/45559917228jw0zt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_60167338991cf.pdfIn PDF document text
    • http://bet-info.ru/kreisler_preludium_and_allegrosxfbj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://delezomixotu.epizy.com/48451060022.pdfIn PDF document text
    • http://dudenakapevawos.rf.gd/petogenidonenasepumejote.pdfIn PDF document text
    • http://mopavazetekupe.rf.gd/convert_compiled_html_to_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/beautiful_in_white_lyrics.pdfIn PDF document text
    • http://demuxijobaj.epizy.com/kunapujafajanaxugavuxeja.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/49900707102.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_off000106b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B7 5152 bytes
SHA-256: 158c95ce2d93e348489180e457d87eeb2fbbe1f80b9a9251062655597e9a7221
font_01_sfnt_off0001183d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183D 10324 bytes
SHA-256: 02108ce35082e6ea75d6f4799b8e43ea3f79c1b43c288559acf930dedecba9cb

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