Malicious PDF — malware analysis report

Static analysis result for SHA-256 6802f2ac11283b87…

MALICIOUS

PDF

69.7 KB Created: 2020-11-19 08:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b0c9d3e1f0c8c16ff5bcabcce89eae35 SHA-1: 2cb690354f90dad76dc195332e1a94878238695b SHA-256: 6802f2ac11283b87bac66e0353463b9b290926e4b2b903dd4cb764fa33d49f19
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=diziler+%25C3%25A7%25C4%25B1km%25C4%25B1%25C5%259F+sorular+ve+%25C3%25A7%25C3%25B6z%25C3%25BCmleri PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5fa05477220ff.pdfIn PDF document text
    • https://lagidipivawe.weebly.com/uploads/1/3/4/3/134347483/9252956.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/7594203.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/jidukeje.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/xezisifirul.pdfIn PDF document text
    • https://nofexozodaxo.weebly.com/uploads/1/3/4/5/134522082/jobasul.pdfIn PDF document text
    • https://kotuvowomikek.weebly.com/uploads/1/3/4/3/134370123/samedagosanude_fevijorot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/82379764336.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/diwakegogesizijegivebevet.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/jibajev.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/dids_worksheet_english_2.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB99B 5724 bytes
SHA-256: c84ad9ca2caac97793e8a5eaee28193091e8a92ec0539162e7e2b4d7bfb156f9
font_01_sfnt_off0000cbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEF 12312 bytes
SHA-256: 51d201dcb76b2a9b51764c162692c70a463e9851ebbad968402b06387ecc84ab
font_02_sfnt_off0000f2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F4 16096 bytes
SHA-256: 292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87

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