Malicious PDF — malware analysis report

Static analysis result for SHA-256 172e40d9aa957446…

MALICIOUS

PDF

66.4 KB Created: 2020-12-10 23:51:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 733af2e63f86a6a45b8f7d767a39872d SHA-1: 8093194a4778061066abb428a954d4d72b3f69a1 SHA-256: 172e40d9aa957446068e0e36ed2d9388283c4d65a02499d8bdf74e7a37f0f906
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'farming guide'. No scripts were extracted, but the PDF structure itself facilitated the inclusion of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/aws?utm_term=fgo+onigashima+event+farming+guide PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6a375147b148042baa1e/1606380088929/inferential_questions_definition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf4c53fdc31513a0ee1c3/1606218949831/dericam_s1_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de60cf0c-5f8c-42e9-914b-35b26ca653ed/record_of_grancrest_war_episode_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9983c943-b83e-4dde-98ba-efbb1c28e3fe/halo_new_blood_reddit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc69aba0b6b03258f5ce907/t/5fd11354deefa60a95f3649f/1607537496844/game_of_sultans_shape_changing_stone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ebffabffab30daa8de6c/t/5fcff90d349c94085915cf29/1607465230459/shooters_world_precision_rifle_load_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59d23ac-0606-4f48-845b-16ae89ab9a9b/pdf_soru_bankas_indir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc555fff9866f3fd2f163c3/t/5fd090b85efba8153b267ddc/1607504056595/ms_bike_tour_2019_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ddd015-33f4-4c81-952f-e8483e81d198/vovimepu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59dd9ee0f32b874afdec/1606375902365/55427083944.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53b8ac14dfd36fe0dfb0a/t/5fd207bba9eaf43bd85a5fe3/1607600060436/recorder_musical_instrument_in_french.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc194132cf09257bd70d589/t/5fc8db044b97230d0516fe20/1606998788443/36462040977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/affbf8fb-3bc4-459e-9b5b-470b3f390281/azure_lane_farming_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d1f472b-9309-4844-8208-36bbd3259149/rokulijojojebepopijivib.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_off0000c557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC557 5304 bytes
SHA-256: f84681bca906eeb56b12e4d80cddb9fd4b0a999be2cc804dc0fec49e15bdcbd9
font_01_sfnt_off0000d749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD749 11076 bytes
SHA-256: f703e9e34d09d15ccf54e64a75594e3575015fa0db0e5c7ce14af6e3dbcc2a24

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