Malicious PDF — malware analysis report

Static analysis result for SHA-256 491072164673cc2a…

MALICIOUS

PDF

73.1 KB Created: 2020-11-23 02:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c6f065b828d0030cb29996f6abb1b207 SHA-1: 1f01c3aa38cf08022575790b8ef1691e9d96c459 SHA-256: 491072164673cc2aa25811c384c78a4e59a024f50c658acb06dc79f90f162ebd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM'. The embedded URLs and the document's metadata suggest an attempt to generate traffic or distribute further malicious content. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing or spam distribution mechanism.

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://traffset.ru/123?utm_term=13+reasons+why+quotes+season+2 PDF link annotation
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/2446307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449181/normal_5faa88bd6fa97.pdfIn PDF document text
    • https://nalatuzub.weebly.com/uploads/1/3/4/3/134324595/8958775.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/d1c1c027-d578-46c4-83c8-91b692942a7a/nordictrack_audiorider_r400_recumbent_exercise_bike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f82ccb0-f8be-4ea3-9f28-3cd391660d5b/2815228323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d47f609-096e-4d28-99d2-56a23a5d871b/23958301766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f307b2f-0d52-4710-b893-a8519306e33f/jpoint_red_dot_sight_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/addressing_barriers_to_learning_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd59083-7054-4161-bde5-00a6a6f2b586/meat_eater_complete_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ce5830-3832-40ae-81a0-ba5936814727/50839043500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad50adcd-4a8b-4caf-b34a-ac129007c1ac/96829115671.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/daria_episode_write_where_it_hurts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aebe7dc-3a1f-4ba6-9e83-f47cb005a9a5/world_of_warcraft_leatherworking_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a36779-8b6e-49a8-a14d-1185965aa1f5/84687456747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7146eaab-0945-42cf-9a64-37e00935c0f5/crash_course_geometry_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f73dd8-4efe-4b5e-89be-645cc5aa5aac/5886949874.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_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 5312 bytes
SHA-256: ac912653433fd131f7533a6d1659569cc0af0b426b1d592316cd2bd17db1c516
font_01_sfnt_off0000f34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34B 10120 bytes
SHA-256: e5780549cba454dee4e53d9cf18c11b6c01b0dd898c1884fc87daee8c1d4209d

Open this report in the interactive analyzer, or submit your own file for analysis.