Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9a5d450ba1cedc…

MALICIOUS

PDF

72.6 KB Created: 2021-03-23 08:33:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9004a204dee7b3ea4f92fcab30ad319f SHA-1: 1f7b3be786bc008a3db4e8e3e6b8ad1962a73e04 SHA-256: 1e9a5d450ba1cedc78bf6b963544c9d869dfd2fba4485abb1867fb6e3c0a11de
126 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/123?utm_term=print+labels+template+excel PDF link annotation
    • http://palubofapejuraw.mywebcommunity.org/should_catholic_high_school_be_capitalized.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/fiegfSS/voice_recorder_free_high_quality_audio_recorder.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/jxhijeQ/fast_and_furious_spy_racers_cartoon_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/haigfN1/naturalizer_flats_dsw.pdfIn PDF document text
    • http://jolovomolosubi.getenjoyment.net/bogalozerapiwaxidid.pdfIn PDF document text
    • http://ponaxamewimenul.sportsontheweb.net/zipimomumadepelunusejus.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/82675572048.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/pharmacotherapy_casebook_10th_edition_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/yidrgdW/mobile_wallet_digital_payments.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rofuvawitarul.atwebpages.com/martin_lutero_95_tesis_resumen.pdfIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_c133831aa2fa446e921e7387a330721b.pdf?index=trueIn PDF document text
    • http://xakagigoneliv.myartsonline.com/thomas_calculus_solution_manual_13th_edition.pdfIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_53ea2106910c4f07b18402d0ffd23516.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44fd20a6-fdeb-4b46-b30e-190a379dfcad/19350197529.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_a09f25fea37e4554a8e6dee9e8639259.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38cbf10d-d583-4de9-8f6b-d9f7dfcf6f31/harry_potter_butterbeer_recipe_starbucks.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_off0000e1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E0 5288 bytes
SHA-256: 9986a6d647b9abd266ef70982d85a833801fee12d98c872b54c5013e835afe33
font_01_sfnt_off0000f3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C1 9896 bytes
SHA-256: 2bba2dc0f37a8b2f0724b4364fe6d575a4c7fc5d319ab3cb50008de2ca1768c4

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