Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c0d7bfe294b6f3…

MALICIOUS

PDF

75.9 KB Created: 2021-03-30 13:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 659ed6c65bcbaf2768ef2c1fe8c48fff SHA-1: 5acb84154ef215f45bd9679e2a4ed23c5a363952 SHA-256: e0c0d7bfe294b6f321a97bd1b3964a11feaa755e86f69a86c05c2dc329ad1f3e
146 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains, a technique often used for phishing or distributing malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically related to phishing. The document body, though heavily obfuscated, suggests a lure related to 'Facebook lite apk download free', aligning with the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://kuzutuzo.ru/wix?keyword=facebook+lite+apk+download+free PDF link annotation
    • http://ig-support-service.com/write_for_college_a_student_handbookkceaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_60324ad619e77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_6057b99302585.pdfIn PDF document text
    • http://tramlaweq.online/healthcheck360_phone_numbercfojs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_6027e6c73a776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490376/normal_603181c77915f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_604188c512e00.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/how_to_turn_on_wifi_on_hp_probook_6550b9ybum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_5fd95cc5f14ab.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/bbc_6_minute_english_video_free1vbgi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409811/normal_6000a9bf9ac2e.pdfIn PDF document text
    • http://trackcreditscore.info/rmv_learners_permit_test_practicemu22g.pdfIn PDF document text
    • http://nasty666.space/fluent_forever_chinesejv0vc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467586/normal_604f8b4597bbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/standard_business_letter_format_australia.pdfIn PDF document text
    • http://gagugitebuf.atwebpages.com/70633850548.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/denomaronipu.pdfIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/what_is_an_aquifer_thermal_energy_storage_system.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/what_is_doubt_a_parable_about.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/angry_birds_movie_tamil_full_movie.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_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 5224 bytes
SHA-256: 5ef274076622555dc9601b886accb1131fb6dbbc8182999402defdc650412668
font_01_sfnt_off0000ff34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF34 10332 bytes
SHA-256: 84736017a57a79847f2c8e02abbe631b223c3210a85c11738e9119325857b1dc

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