Malicious PDF — malware analysis report

Static analysis result for SHA-256 c195da5cae15cb5f…

MALICIOUS

PDF

138.7 KB Created: 2020-12-04 14:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 38f25111cd14cd06a8c9f1816c6a80dc SHA-1: d8373fb458188ed405029b8aa94d53dc45abf2f9 SHA-256: c195da5cae15cb5ffcbfac421b8e17d4364225022d131ffa4f6bf16a7ac14c5b
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 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=spirited+away+old+lady In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f98ab2d0ad42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5fa08a8d4d627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403676/normal_5fb717f5931cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471710/normal_5fada4687ea2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc37d0aec917750a3e81c42/t/5fc7bb547995075abdef5024/1606925143709/suxidun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28eaf9698b02c7f2b2aca/t/5fc44bfa4f9837572068567b/1606700026770/3379376892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc674ca2-1f03-446a-b65d-b0d37662edff/67369289402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be61f7f4-fc02-4411-9c98-6361e028cdd7/how_to_hack_bike_race_android.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/queens_of_england_in_order.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f988e2fce462bc8c518c/t/5fc7c84521434e227345bf89/1606928454304/download_little_big_snake_mod_unlimited_money.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/76885701136.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf4cb2c6de34c7a381c77/1606218956940/plural_of_family_in_arabic.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_off000168d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168D9 39504 bytes
SHA-256: aaab821b2ee47d8e5559f00fe4dd96dc9c62e504e4930f87c82c1999b558ae1a
font_01_sfnt_off0001e30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E30A 5072 bytes
SHA-256: 6b21e6236ea60fc316257eb14a42f681b046baa29b22d8e1ba35abb4fbece1fb
font_02_sfnt_off0001f46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F46E 12760 bytes
SHA-256: ef32d09e329bbc1c71161194dcf823b3a86d0b0cb1d8d623407d021f272bb4ab

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