Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e67c5e09b69f75…

MALICIOUS

PDF

82.6 KB Created: 2021-03-17 19:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 16f59fd5e86f7326e976f20f0b14467d SHA-1: 66c2bf248ce25bde07ee98f936bf0ba417fe8e66 SHA-256: f6e67c5e09b69f75e8d8ebce5ea923bd2eef04acd1f3662327c99f3d15d83ee7
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=letter+of+indemnity+real+estate PDF link annotation
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/4d90771a400.pdfIn PDF document text
    • https://cdn.sqhk.co/rosubeno/gflDXii/60248262835.pdfIn PDF document text
    • https://cdn.sqhk.co/genazeres/awftjbQ/xazizujawuravo.pdfIn PDF document text
    • https://zefulesemed.weebly.com/uploads/1/3/6/0/136021217/2706918.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/bjjhh8V/office_delve_for_office_365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_602643773ee86.pdfIn PDF document text
    • https://cdn.sqhk.co/tamenotu/7Eijwid/vodanotakaruga.pdfIn PDF document text
    • https://cdn.sqhk.co/wikepijosipi/zjihhb4/54395652864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_60523356895b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_600744f5acca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471109/normal_5fdb2b996d523.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/kjihYyV/where_are_cashion_fishing_rods_made.pdfIn PDF document text
    • https://terulupi.weebly.com/uploads/1/3/1/4/131406892/nozivimosisolu_xurinexe_dalujapigaxo_mowutekexag.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/ligukpI/prostate_infection_symptoms_and_signs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/694e675c-4916-4d32-bc73-d56341fe52b6/zojivizonolalon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c29f43-2681-4abd-a01e-d0e806e8cdb1/dajopavozusazenab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bcf7cf7-2e04-4758-b277-1c1124807ae9/windows_10_pro_cursor_disappeared.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46be1ccd-2b0d-428e-83fc-734d8b5bbafb/favawuzijodew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/994332b5-c44f-48ae-91c5-e835142fdc16/what_did_the_ninety_five_theses_say.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_off0000faaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 5096 bytes
SHA-256: 63754078d5f4ecd5a843dc37d38e8f6b79026a7ea1d6489cf9d6d345e3069ca3
font_01_sfnt_off00010bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEE 2012 bytes
SHA-256: 81ef9ad6d1ffedb987327c810a3cf4fb4482d2833fd01cad8ac46eac25a4cc67
font_02_sfnt_off0001158d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158D 11564 bytes
SHA-256: 262aa0c78f9a081fd0d7b3da123c0b6bc881e03fefa105760283116913bcf1f8

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