Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e20942aa90867b…

MALICIOUS

PDF

102.7 KB Created: 2021-03-09 17:29:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef48f8da2525a602a8661f888c4806f2 SHA-1: e2b6f2b429f0eb2dfcf146b3fb9cf8f5454a5928 SHA-256: e9e20942aa90867b6ce55309fa5a5285b75ef899ae837ec75315a7f4b75bc660
166 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including an advance-fee scam lure. It contains numerous external URIs, with one pointing to a suspicious URL that appears to be part of the scam. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jacksth.ru/award?keyword=week+no+calendar+2020+pdf
    • https://cdn-cms.f-static.net/uploads/4414175/normal_602a3c8d1f9eb.pdf
    • http://bagerisevi.scienceontheweb.net/komojutedajodedudi.pdf
    • http://finomimetafix.sportsontheweb.net/remington_16_inch_electric_chainsaw_manual.pdf
    • http://sellforce.ru/kyoto_autumn_colour_reportucb23.pdf
    • http://kkkirrreeee.space/bootstrap_4_navbar_template_examples92evw.pdf
    • http://lovelatu.iblogger.org/cessna_152_parts_name.pdf
    • https://cdn-cms.f-static.net/uploads/4454054/normal_6028ff6d1f9c2.pdf
    • http://segaruzobuguses.scienceontheweb.net/92657916207.pdf
    • https://static.s123-cdn-static.com/uploads/4473645/normal_60048dc286247.pdf
    • http://am-sound.ru/breast_cancer_causes_and_preventionlrmr1.pdf
    • http://nasufulorejuwe.mywebcommunity.org/how_to_get_certified_insurance_agent.pdf
    • http://lerob.info/989896491508zuiz.pdf
    • http://kukushpa.fun/86068126676f3u62.pdf
    • http://zoxuruje.sportsontheweb.net/how_to_ground_balance_a_garrett_ace_400.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ginowane.onlinewebshop.net/comparing_adjectives_and_adverbs_exercises.pdf
    • http://bumurulepowele.myartsonline.com/41631534405.pdf
    • http://bixodog.rf.gd/all_actress_photos_free.pdf
    • https://uploads.strikinglycdn.com/files/8de016e6-2fb6-4aad-80b6-37aa6e16fa32/35457542822.pdf
    • http://gexitake.epizy.com/wakosolawufifuzewikutezo.pdf
    • https://uploads.strikinglycdn.com/files/857edc24-b83c-4886-a728-82303a75eab0/red_brindle_dachshund.pdf
    • https://uploads.strikinglycdn.com/files/8cc3aae0-cc5a-41b9-8d87-3221ff241dda/jurijovevasakora.pdf
    • https://uploads.strikinglycdn.com/files/9ea84cee-ea08-49e4-acf1-fa944428da18/purukibop.pdf
    • http://zikinevubebera.epizy.com/8891743488.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_off000155f4.bin
245ae88f5f3b90296e63ae5942dd34281a73fa6d4d6ea03aefb46f61419b4fa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155F4 5324 bytes
font_01_sfnt_off00016834.bin
095b417180bb0abbe06b63d5f7574312e22dc10da32e38ea18b006e18bc3862b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16834 10988 bytes

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