Malicious PDF — malware analysis report

Static analysis result for SHA-256 374149d37521b9be…

MALICIOUS

PDF

77.6 KB Created: 2021-03-30 05:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 57cfbb820599663dbdd3dbf9eb430861 SHA-1: b67877dfd657d5c7a6b646bcd10d86043c771c41 SHA-256: 374149d37521b9bed4d12035a64c969aa6b40104f04c4c2e66dc3e4e898f3698
134 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a primary suspicious URL pointing to a site offering a software key. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to trick users into downloading and executing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=letasoft+sound+booster+key+free+download PDF link annotation
    • http://fanitukasi.22web.org/bakery_and_coffee_shop_business_plan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5fff8393ba747.pdfIn PDF document text
    • http://xiwijub.22web.org/kagan_strategies_for_math.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_601d24c321558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_603d21c9d08a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502698/normal_603aea7d4a389.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/6f4c0637-cabb-41c8-b4b4-1d9bb6d5b763/cumulative_effects_theory.pdfIn PDF document text
    • http://tapanowi.epizy.com/tarekat_alawiyah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3e2a404-d860-47fa-bf45-e2e5cf882263/hampton_bay_e75795.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/1996_polaris_trail_boss_250_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f3e931-e43e-453a-b693-67c2a23c2eb4/lemaxugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd0cf5c-3930-4780-be37-e5d17e745b85/14489174006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/296026fc-bfb0-4c01-8a33-2f474177f44e/center_point_scope_4x32_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3366e0bc-574a-44b2-9975-429726c42b61/40686022786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9069985-91e2-41ba-b99f-bbec73bebb16/93283386905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e7affa7-1792-4aea-a680-06f610d64241/53405112229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5b694a-fe4d-48b4-a3c7-0cc35e634836/2010_town_and_country_4.0_oil_type.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1845692a-e0c9-44eb-b83f-bdb9ca943740/9523910715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08256f05-41d3-44e6-8764-d0908f364140/whirlpool_cabrio_platinum_dryer_owners_manual.pdfIn PDF document text
    • http://mirimanomuropa.rf.gd/bmtc_bus_pass_application_form_for_college_students.pdfIn PDF document text
    • http://nedafab.rf.gd/movies_free_without_registration_membership.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/bandobast_movie_trailer_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/aves_sin_nido_descripcion_de_los_personajes.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/9142444833.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_off0000efd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD5 5240 bytes
SHA-256: c2e2aa220d19d285f9ea94cfa807c46f3437c507377d09faea567a1ed4c26181
font_01_sfnt_off000101d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D2 11436 bytes
SHA-256: 74dcccce482e25446aedae5bab8d8605145afadf60c16ea8879582d67703c6e2