Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09f44fb2da6ce51…

MALICIOUS

PDF

79.3 KB Created: 2021-03-18 23:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 499faada082897e485311c550a7fdd8a SHA-1: ca60dd6742e28a24fe6aca94660e9c6efa2bdfe6 SHA-256: a09f44fb2da6ce510e6db6c78f7f0d636d3e2eaac493864b1c6c4a651866c487
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=clash+of+clans+apk+gems+hack PDF link annotation
    • http://zosuwalerikare.getenjoyment.net/90254399125.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/OjjpjeB/vemotelavowazitomim.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/windows_hotkeys_not_working_in_game.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/what_was_beneathas_dream_in_a_raisin_in_the_sun.pdfIn PDF document text
    • https://cdn.sqhk.co/bebofuwe/akTgiCj/apa_manual_7th_edition_canada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_ca3a5af93c6a4e22b023ee057aecbce2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1321e2f-52d1-4cc8-b7ce-8c103b78089f/xatanujobulosotonapeloxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906f3a9f-8a8e-4c47-8e10-dc3e88a628f7/razasuxobanedamivus.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/bounce_ball_game_phoneky.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/7186082331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15768216-1d5c-436d-92a8-93f311ce81ae/the_expanse_season_5_episode_7_synopsis.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/amnesia_collection_trophy_guide_ps4.pdfIn PDF document text
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_a97366f5423e4ad5aa655656bcb14613.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xixonu/zelononoredamareful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/961086c1-46f5-4fee-a2e0-4655f005aacc/how_to_fix_squeaky_engineered_hardwood_floors.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/67831410667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14799149-1730-4175-94bf-7710e823a9bd/death_note_anime_episodes_imdb.pdfIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_5c49f030b2a442aa9bfefe8133e1998b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/bewagofemopajemumapogu.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/reading_skills_notes.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_off0000f95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95F 5300 bytes
SHA-256: 0260c9feb31a125176ef70503bf69f410cd3d1441a2476614540cea91e33ba28
font_01_sfnt_off00010b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4B 10772 bytes
SHA-256: 88c4f4abb9955212aa98129c1cf877dd0bc75ae7d221b4f5399204ac1ed9b143

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