Malicious PDF — malware analysis report

Static analysis result for SHA-256 98449e3a44da03c2…

MALICIOUS

PDF

80.8 KB Created: 2021-04-11 21:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 85c278dbb027c08c221755eaa018d5c3 SHA-1: 2a2e3cba717e82a696da7bd4219386944412d2c2 SHA-256: 98449e3a44da03c23502c5f1050e779f2b12150b098443bb69489f8b14f225f4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=lord+of+the+flies+chapter+10+reading+and+study+guide+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488137/normal_60403aef2bd70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503791/normal_602d6b449047d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425921/normal_5fd8b4c125b0e.pdfIn PDF document text
    • http://gurazibatinades.iblogger.org/13473224835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453747/normal_603a2d9c9b92d.pdfIn PDF document text
    • http://viwonef.iblogger.org/b._sc_chemistry_books_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fokafas.rf.gd/robert_nozick_anarchy_state_and_utopia_1974.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/what_is_the_theme_of_the_story_peter_pan.pdfIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_66174241d0e04018a0f9e109e7b8ccf6.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_793e5d197f6e416f8e3e9e04e97855e5.pdf?index=trueIn PDF document text
    • http://lajirobodogew.epizy.com/what_is_the_main_purpose_of_holograms.pdfIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_ffce93a73bce4ef38b2a22add03d2bb6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/pijizenuzinedekum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9adb6d7a-effc-4f60-bfeb-2a8424974677/john_deere_42_inch_snowblower_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/amazon_prime_video_app_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129f291e-2009-46c1-a847-bf9d57d8bd89/surah_yaseen_beautiful_voice_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/gifusakudapurijexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e57acc0c-8a55-4d7f-945c-b39d15f34123/65773643425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b3252a-2a6b-43a5-9ac6-af941af76c0f/the_sense_of_an_ending_analysis.pdfIn PDF document text
    • http://lajirobodogew.epizy.com/aviation_security_training.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE0 5748 bytes
SHA-256: 0d496516efd21942b067070f144fe3c341e60bb553b5f1875bcf1395a8c1f00e
font_01_sfnt_off0001118f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118F 10548 bytes
SHA-256: f8cba40b419c5ba0de436fac66537de2a5fc1762e134fbb3613a5f6eb2d42d7b

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