Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40b74cb08f101d0…

MALICIOUS

PDF

50.6 KB Created: 2020-11-11 18:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbbdd078e944ada6f35091722a43a184 SHA-1: 28d44ce38b57e0f73bf49875f58686949c5370f2 SHA-256: b40b74cb08f101d07a1b0fb291f80dd120f35ce588f785025020f3e516af8892
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it might be part of a link farm or phishing campaign. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful content or facilitate SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7738

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?utm_term=tipe+isoterm+adsorpsi+pdf
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/2624410.pdf
    • https://daxusakisawepan.weebly.com/uploads/1/3/4/5/134527958/151fc0558ec787.pdf
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/9439267.pdf
    • https://fisezofibidan.weebly.com/uploads/1/3/4/3/134316577/8495f5.pdf
    • https://dumaxenuwumav.weebly.com/uploads/1/3/3/9/133997891/tabiralusufuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/31c7fff4-d7b5-4544-81ce-a59fd620b301/vedami.pdf
    • https://uploads.strikinglycdn.com/files/b7b488cd-829d-4402-87be-1165c6f4626c/31791814901.pdf
    • https://s3.amazonaws.com/pivetuzadujo/coffee_bean_and_tea_leaf_menu.pdf
    • https://uploads.strikinglycdn.com/files/1d921f29-164b-4259-bc5e-0fddee778866/mapilajolif.pdf
    • https://uploads.strikinglycdn.com/files/17a70eaa-f6fe-4cf9-a7bd-164eeb62087d/molixanesobajufotil.pdf
    • https://uploads.strikinglycdn.com/files/e046c620-e8f3-4c5d-a332-52e6a78d878f/jerora.pdf
    • https://uploads.strikinglycdn.com/files/9219cc63-1c1f-447a-954c-e8458305f5cd/91416932371.pdf
    • https://s3.amazonaws.com/tuxutedi/zelogunenisuji.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbbf.bin
1754a992513a7c15d07e99d218bdc5478b78ae50ace9cfaae27f53ff1fbae6bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBBF 5104 bytes

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