Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c18a0ea192f0c5…

MALICIOUS

PDF

46.6 KB Created: 2020-11-09 15:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 34196c949fd1e199248d12f3b7238761 SHA-1: c3f164c3a4e586c62d4bee7e014dc7b5137a94c1 SHA-256: c5c18a0ea192f0c5ec78828942beb2d2c393b7113b791300225e992af35b8523
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, "https://traffine.ru/aws?keyword=kroger+application+23320", is flagged as a malicious redirector, indicating a phishing or malware distribution lure. The document's content, though heavily obfuscated, includes references to "Kroger application 23320", reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffine.ru/aws?keyword=kroger+application+23320 In PDF document text
    • https://rozujefugupag.weebly.com/uploads/1/3/4/0/134017035/878103.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/ab724f1c868.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/c147e334ca1e3.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/gedemeti_vemopu_nurowetovideler.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9637702f-d100-4389-bd10-34bdb07bc76d/26569337843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173a8052-2f18-4424-8f82-601fcbf5cdb7/21695645965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a7bec0a-46af-433e-a28b-0d4a2cb6cfe4/myfitnesspal_net_carbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81515ad0-2a04-4187-be3f-e911656a2915/videpuxomamibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/420dffb2-d5ea-40a9-88d3-973d9da99dc9/bisulobetikepifa.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/fivafomiluvawizokejidifam.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/fudep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba78533a-48f8-4202-a54a-954ea804fbbf/padezete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f010fe0-93a5-4335-936c-ea229ced59d7/rosario_de_las_lagrimas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A39 5116 bytes
SHA-256: f251faae79a1d0779e060beae42ffaa57cdb36baf3971480a09067593f265046
font_01_sfnt_off00007bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAD 10676 bytes
SHA-256: 17921126b743ee5cd6cd429fbd9229ee21476933efc6c427fe77ea2b626472db
font_02_sfnt_off0000a005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA005 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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