Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f0ae845a52f3c5…

MALICIOUS

PDF

81.8 KB Created: 2020-11-25 21:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b9ec1c66d728051572f90ce33ffa822 SHA-1: 4d9002e8b28bfecf4e4765ca19f647d5a4d603a6 SHA-256: e2f0ae845a52f3c58b6388ead640f13fccdd59099f47e1da724e355a662ef64e
214 Risk Score

Malware Insights

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

The PDF document is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector and part of a link farm. The document body, though heavily obfuscated, suggests a lure related to a 'Proctor silex slow cooker manual'. The embedded URLs predominantly point to link farms and redirectors, indicating a phishing or scam attempt. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=proctor+silex+slow+cooker+manual
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/mekikagu_jotixozi_fusofebagaja_zozewup.pdf
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/9021054.pdf
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/gilamurolopek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/db934cfd-e780-4a3c-805c-dd1c000d3aee/velocidad_media_ejercicios_resueltos.pdf
    • https://uploads.strikinglycdn.com/files/ce6211f5-c2a0-4e02-a46c-e02b29ef28c4/96821548993.pdf
    • https://uploads.strikinglycdn.com/files/bb2f6755-eb80-4999-a4a7-bac85a5f1d56/intermediate_chinese_textbook.pdf
    • https://uploads.strikinglycdn.com/files/54f83243-5993-47ed-a1af-9f1cda5c2d65/752412674.pdf
    • https://uploads.strikinglycdn.com/files/3f2ef23f-1b37-43ba-82f4-60439d908b09/40871760643.pdf
    • https://s3.amazonaws.com/bezorito/gone_baby_gone_parents_guide.pdf
    • https://uploads.strikinglycdn.com/files/341b3b21-903c-4c90-840b-6636d27750a6/xadamejobigokodojopa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f58d.bin
bdd47e63db79239acfef5b30df58c3bdf5b2d9388d4441fa09392f06d751a372		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 5052 bytes
font_01_sfnt_off000106ae.bin
84821d25d2a8a5377ccad74730f563f344997083a8abd28be41279bb9abb0c89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106AE 11264 bytes
font_02_sfnt_off00012c2e.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2E 4324 bytes

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