Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14a1907bdb4749a…

MALICIOUS

PDF

79.6 KB Created: 2021-03-25 14:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1d96e41fcfdb5a977a152ef4185129c9 SHA-1: 35472f9135a7f19abe1eefc4eab57ef091e25a0a SHA-256: a14a1907bdb4749a11c8dab6afc94cd61aa7dd30eb336e88d8c984c9622ac58a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to unknown or potentially malicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the PDF is designed to host a large number of links, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/wix?keyword=macbeth+act+1+quiz+answer+key+pdf PDF link annotation
    • http://kovativegapok.getenjoyment.net/84632480902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403117/normal_601bc1a26a623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477630/normal_600d7952ef204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486772/normal_600af00de8edf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379742/normal_5fe151d5806f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454546/normal_5fdc6f5190182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_6057a9a1174fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424981/normal_603f31e32b253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_601bacd9b240c.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/fb031b63-5f70-4664-a186-dd6c5b47ffeb/which_plc_is_best.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/what_are_some_positive_feelings.pdfIn PDF document text
    • http://nelaxufap.rf.gd/62182780590.pdfIn PDF document text
    • http://furipurisebete.onlinewebshop.net/continents_and_oceans_of_the_world.pdfIn PDF document text
    • http://legokejapo.atwebpages.com/44395243769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78dad68d-6471-4d52-969a-b220aa3e6298/in_the_time_of_the_butterflies_chapter_11_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/maplestory_reboot_link_skill_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/past_simple_vs_present_perfect_exercises_advanced_level.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/86995059983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c7f3039-4c32-428b-ac10-7dc430782e4d/baptist_hymnal_songs_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/977efceb-dbd0-4a64-930b-5f993ccd5b3d/a_clash_of_kings_vs_a_game_of_thrones.pdfIn PDF document text
    • http://livirava.atwebpages.com/volume_calculation_formula_for_different_shapes.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/42992177015.pdfIn PDF document text
    • http://talusulimatedo.rf.gd/70929520878.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_off0000f9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C9 5840 bytes
SHA-256: e8798c57bc26d505d935c4bcf2ba3859c4b21d2d206d379fe440013ec6d4b852
font_01_sfnt_off00010dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD0 10480 bytes
SHA-256: 4e08d63608bad82274dd226c1bb2ee5141159f1180bc708f14105ca05a780a06

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