Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8f5fdd181ca8e6…

MALICIOUS

PDF

101.4 KB Created: 2021-02-17 06:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ed143f9c73ad09f0e11ad418c98067fb SHA-1: 0046b9fcb2495b4ccb818b9cce91bf4883b68e3c SHA-256: ee8f5fdd181ca8e6bedc97b73412ea0dec3d569f2cc8b448286d2644a1a55bb0
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or content-luring scheme. The presence of external URIs and the overall structure indicate an attempt to direct users to external, potentially harmful, content.

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://leonvi.ru/wix?keyword=restoration+skill+books+skyrim PDF link annotation
    • https://cdn.sqhk.co/satofapo/iGbJids/download_street_fighter_2_multiplayer_mod_apk.pdfIn PDF document text
    • http://tortomsk.ru/bit_heroes_familiars_guidepwdib.pdfIn PDF document text
    • https://cdn.sqhk.co/wepugozotap/bjdhffd/team_pulse_check_survey.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445879/normal_6001eaf953175.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/v6ghibI/car_park_crowden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_60162bcbdc0dc.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/ahcgeDF/fulizotipale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486215/normal_5fe399ed9d4be.pdfIn PDF document text
    • http://bigno.space/duwaluvezacpv6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5fcbebcfbe5b6.pdfIn PDF document text
    • http://setofexperience.site/verupobegeragodutupuu3hy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5fd13b620dfbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385876/normal_5fec0ba32c68e.pdfIn PDF document text
    • http://vigastlens.xyz/geometric_706_font_family_freeyqk31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fixekemira.epizy.com/54782646438.pdfIn PDF document text
    • http://falogivaxaf.epizy.com/hodder_education_gcse_history_answers.pdfIn PDF document text
    • http://furofazitogo.epizy.com/45668483309.pdfIn PDF document text
    • http://poxelisenaxoxig.epizy.com/31525211919.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_off00015056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15056 5144 bytes
SHA-256: a8534083e771841ea5e2a2fed6fa076f20acee9b5322cc9adb09bbd94d50a15d
font_01_sfnt_off000161cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161CC 11268 bytes
SHA-256: 5f04ce7d2c1da2931ce0792138c76e0274d649fac69a8fa272ce3a8603a14841

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