Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcffbf44e589e8a8…

MALICIOUS

PDF

87.2 KB Created: 2021-03-14 15:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 50aa7318a7b84c33f845f6d285c6510e SHA-1: e6b4ec60ca12e266ec46672e1efe97b431a31211 SHA-256: fcffbf44e589e8a88b799ea66dab747e74f527629f4b9e14ad8dc3d4b6a6e114
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 0.9996

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://jacksth.ru/strik?utm_term=gone+with+the+wind+hardcover+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369158/normal_5ff3941fa0384.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/ejax5sT/35882650886.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/8971236.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382430/normal_5fc8d038d910f.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/held0dh/47122475099.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/dEjbU8q/find_my_iphone_turn_off.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416792/normal_6023c44f421f9.pdfIn PDF document text
    • https://cdn.sqhk.co/wepugozotap/jThdgjr/las_vegas_slot_games_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_604d00171a1b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476936/normal_5fc7ce21aedaa.pdfIn PDF document text
    • https://cdn.sqhk.co/dopiporajen/fUgfYIz/86468150512.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/7oibjbO/mega_ramp_tony_hawk_pro_skater_1_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_602d1de9a8416.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/hg2hg6e/80773229058.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/kPvhjih/stickman_street_fighter_stick_fight_wars.pdfIn PDF document text
    • https://defiduzumuxel.weebly.com/uploads/1/3/2/6/132682342/0fdf45eb4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ropuba/80261435349.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/mewiwivalozofalepu.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/74450275295.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/dolby_theatre_hollywood_guided_tour.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/lularoe_gift_card_template_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEA 4992 bytes
SHA-256: 8581e19d8cb0ffe74f822b80c97ec825fc7f9e1d97dfb982525376672e8d0758
font_01_sfnt_off00011cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF3 10392 bytes
SHA-256: d7116f080b59ff8780fc38adfcb3fe6d245aa56a3bc2af6d1761014482023e30
font_02_sfnt_off00014082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14082 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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