Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc69e9e71cb526e…

MALICIOUS

PDF

61.9 KB Created: 2020-11-26 18:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: eb745359dae72b1cb4b4969c98f33326 SHA-1: 95b7f05629d71dc1f3b0e4301bc9e7181e9c600f SHA-256: 4bc69e9e71cb526e79706a08320856807e41ed572a962742cf1ae084ceec716c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?utm_term=a+wild+sheep+chase+dnd+map In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470961/normal_5fb48e917856b.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/40502fa8-b053-48ba-96f2-a22658b1ed93/44297619196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab1d400-cd7d-432b-93e9-d6690cbfbcfb/does_grape_juice_make_you_poop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350d01b2-07a7-4d92-bdf4-b9886558c362/soluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79804c86-8c70-4380-8e50-816c88f53f00/9268848115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0044edb-faf1-4945-8b87-33849d2c9bb7/62842906449.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/messenger_old_version_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b1c52d-9caf-4639-bc95-4af01ca34d72/bivazefewibegopib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42bca33-901d-43c7-9b13-1cc48d1a7e32/eker_elektrii_iletir_mi.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/wukamuxokelepagezega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ee6366-773a-4d35-8439-bf56d83c7da7/29250063673.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/zewised.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/79599933359.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_off0000b591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB591 5296 bytes
SHA-256: 9328d7f33db788cc8bd203a9ec2beaf559bd025b8becc45fdedbc387e23d1530
font_01_sfnt_off0000c786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC786 10716 bytes
SHA-256: 79e0b3f0e4e1723df66764db445105ec86d18aa57f21abc1421198b2f0734e95

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