Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda2aa364b33c4e2…

MALICIOUS

PDF

73.5 KB Created: 2021-03-23 01:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 013d2e0834c298c85e32114af7397e7f SHA-1: 386a86c77dde1e114b859efe2b3b82b0018c9208 SHA-256: bda2aa364b33c4e2f9e65b4aaa111f73b40279155464f078f8dc299554f9ea49
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a primary link pointing to 'xezojetit.ru', suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to a 'bill of sale for car pdf'. No scripts were extracted, but the presence of multiple external links and the overall detection profile strongly suggest a phishing or downloader attack.

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://xezojetit.ru/award?keyword=basic+bill+of+sale+for+car+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486981/normal_60296a36c99e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_60066bd612680.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/tZveggg/budukikefidimubese.pdfIn PDF document text
    • https://cdn.sqhk.co/livejizilul/Vidgfjj/39430543695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_6022cdaf30dc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496826/normal_5fcabe9d852d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454300/normal_6023f40555772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451376/normal_605928fd12a20.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/gf1jgUt/fun_things_to_do_near_jacksonville_beach.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448991/normal_6001c73a8ef78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500208/normal_603d4b4066ed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_60207b40a9aba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_5fd7cf9e0cbca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_60341c4d884e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_ce090295f9f94031a462f0c1907f0fac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bfb7eb2-e273-4e21-addf-d31edd8ae029/what_to_comment_on_boy_best_friends_instagram_post.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf7c593-cd47-4518-9f37-0f91a9484def/asp.net_mvc_4_download.pdfIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_f4b5d468ae1944849334859e678e6d62.pdf?index=trueIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_6d050b2090ed4035bd560a77a57e3062.pdf?index=trueIn 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_off0000e310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE310 5336 bytes
SHA-256: db301d4032ffb1862cccd5a63f9026a9372e7c39a6be93304b20db75adf37763
font_01_sfnt_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 10380 bytes
SHA-256: fe0292afaa9efb62867e9f71329bde39d3c82773624da3533b34291910bbfec3

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