Malicious PDF — malware analysis report

Static analysis result for SHA-256 702258ae2d143da6…

MALICIOUS

PDF

68.2 KB Created: 2020-12-15 15:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d0f611acfddc22efb4d4a65e975ecb0d SHA-1: aebca0886ff18fc1cc87eef3526fd109486cb40c SHA-256: 702258ae2d143da64ce5a20517e1881b14d3eeee699911255127906e7f818f77
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a link farm detected by heuristics, suggesting a phishing or content-farming operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

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
  • 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://trafficel.ru/123?utm_term=interview+master+guide PDF link annotation
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/dogoreju.pdfIn PDF document text
    • https://jimazakogise.weebly.com/uploads/1/3/4/6/134612968/715307.pdfIn PDF document text
    • https://povizizumor.weebly.com/uploads/1/3/4/6/134636509/9078817.pdfIn PDF document text
    • https://xoxatazafej.weebly.com/uploads/1/3/4/8/134861408/d2a38a5ff87636.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379489/normal_5fc411e25965d.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/50a4f83a-5fd0-41f9-9496-7d47eea206eb/47904895861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78c765b5-8824-44e7-a102-83437364e664/26513927938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b7eadc-2722-4229-925e-6138f60929df/curved_greatsword_dark_souls_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c155f69-939a-4430-9a70-091d1d25b485/93662656933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37667a12-1a04-4f77-bcde-4785c593e146/mr_money_mustache_divorce_forum.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_off0000ccbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBE 5204 bytes
SHA-256: 7667d3f33e0eea96f316ff9c514c5e17f1078c4a57c61b30bafe5db120667b93
font_01_sfnt_off0000de67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE67 11100 bytes
SHA-256: c05855b4432e5fe32f021f07cdbbe76494829f47d07ccec6e9a4ebcececae443