Malicious PDF — malware analysis report

Static analysis result for SHA-256 991e99a9bbc59100…

MALICIOUS

PDF

61.1 KB Created: 2020-11-13 20:36:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9f79a07a9bf3fb0a4a6c06fe95cc5014 SHA-1: 98b2c3735350dd7b24ac4ece1bef5d744fd38aaa SHA-256: 991e99a9bbc591002c0a291a5a60e3d8babd967e9bc40d2cb6503974d769ed0b
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/strik?utm_term=note+taking+guide+episode+501+quiz+answers In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fadaxusak-nuruputixidipag-fupiwow-dekuwezom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_5fa5a67aafae8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f8ec1039000d.pdfIn PDF document text
    • https://powizosiki.weebly.com/uploads/1/3/4/0/134041047/2010497.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/pikelikufow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6024445e-5349-4b59-9bab-dd918aa4d397/the_phoenix_unchained_epub_free_down.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/areopagitica_john_milton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ed7c38-484a-4369-9328-5c6269c1d83f/62341492112.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/panasonic_av-_hs410e.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/26853970534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfdbdf05-e390-46c1-b3bd-63f15211e768/xedudodiduxodex.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/joker_2019_full_movie_free_links.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9113f4c2-8fd1-4716-84b4-21adb82bbd83/82625043519.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/92339473870.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_off0000b1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1DB 5712 bytes
SHA-256: 65584a8eecbb3d303fe81c534fc285743e07fea8cc3639f9f2b80641125e918a
font_01_sfnt_off0000c589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC589 9892 bytes
SHA-256: d08b15cbc60910afcb2be444ba83f5d848b22254ca092a65f224672d3f77b1f1

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