Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8df6671664187e…

MALICIOUS

PDF

65.8 KB Created: 2020-12-14 05:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b68c1673dea1a74d60b282587a8fe0a7 SHA-1: d8bedf4bf8398d682ab76ce4d1588e4e65158a4d SHA-256: 9e8df6671664187e367241152c76f0c9e7d5414a79647de4fed47bb63e6612ec
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://trafffe.ru/strik?utm_term=mission+impossible+3+parents+guide PDF link annotation
    • https://vawavujak.weebly.com/uploads/1/3/4/3/134350312/416498c22.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/8d74158a-90d9-4007-9e75-12a8d4c642f3/pvc_pipe_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/gakixejugupimesitaga.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6b1208845d092483122d/1606380307991/the_blob_1988.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5dd7fbda9c57a97e032dc/t/5fce632da87f9f1b190d5af5/1607361325815/color_flood_color_fill.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53a9d116eb00e3c685617/t/5fcd17212fa8bc6bcdef2331/1607276322855/sports_card_collection_display.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/avast_antivirus_2018_with_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/gauntlet_slayer_warrior_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/wugit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1d8608845d092452ebf2/1606294919235/pre-marital_counselling_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78412c39fde0238aa55d7/t/5fc8b499dcb5b260798202cd/1606988960798/vugojuleruvabopegojib.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0805cd49dd12447321748/t/5fd1cd39a9eaf43bd855654f/1607585081622/space_engineers_installing_mods.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_off0000c4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E7 5588 bytes
SHA-256: 4cc8c2b1b0b122b6d16786e4ec1a601df2328b09f4a5dbb24a05b27d05f9d34e
font_01_sfnt_off0000d7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CD 10384 bytes
SHA-256: 5d56463b447cc243ba6c8c8f28f205631396f85178ca1ec03a35430b0400f682

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