Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca2080b09480203…

MALICIOUS

PDF

65.7 KB Created: 2020-12-21 05:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: aa99c7f28ca4af5e25c7ef03839d008a SHA-1: 5bd23c0df9c58e54068df0d076dbb233fea8991d SHA-256: 9ca2080b0948020326f925d98a156471a17ce99487ebd240ef0f21fd258bbe8c
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' suggest the document's primary purpose is to lure users to malicious sites, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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=dotloop+customer+service In PDF document text
    • https://static.s123-cdn-static.com/uploads/4404523/normal_5fded5fee8845.pdfIn PDF document text
    • https://sisilodoja.weebly.com/uploads/1/3/1/4/131406442/4562024.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/8b66d066-a6b2-4bfe-9f70-1bbf80b501f0/liftmaster_garage_door_opener_manual_1_3_hp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a795c8b9-a6ce-497f-8cfa-c17d42bcb99c/kagusofemuwuwu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c0b127a199023abb6e24/t/5fc63acae18c5c478ecefe57/1606826700417/fifoguta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eca73a7-9c22-4b4f-8781-d0f7fcc5fb52/34956407808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f0a9cf-bb32-4337-871e-098d7b7e18c6/how_to_get_straw_and_glass_in_skyrim.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a5b42e537a05ef144f11/t/5fc7c7038927470b95c56054/1606928131420/stick_fight_the_game_download_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13119319-4cc5-4cb1-be80-2497fd5bd7f1/segusamemek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e67368a-e79f-4f99-841b-b949b353a264/73924164576.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_off0000c544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC544 4928 bytes
SHA-256: 74c46c809a500a1d5ea892d6f0be2db6dbabebb73bf7b90da20ecf17ed394187
font_01_sfnt_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 10792 bytes
SHA-256: e1b3ab4c171735bc3a0f5049b987d17f576cc24b6e71b3ee006b059266d5509e

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