Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9c580b877c0c3e…

MALICIOUS

PDF

77.5 KB Created: 2020-12-25 11:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d88ca3c0c3a41da6686ef6b754c72ebf SHA-1: bb1b2ae7c7fd99b1a14b55004c3fabc93232f767 SHA-256: 7e9c580b877c0c3eb10c69b71e1ae4f45545b6712d7bd911d610c395c3b5bd18
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://trafffi.ru/wb?keyword=pakistani%20chutney%20recipes', is likely a lure to disguise the malicious nature of the document. No scripts were extracted, but the presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution attempt.

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://trafffi.ru/wb?keyword=pakistani%20chutney%20recipes PDF link annotation
    • https://mosejibufo.weebly.com/uploads/1/3/4/4/134437632/1f039f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403410/normal_5fe2760727ec5.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/8372418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417306/normal_5fbb3dced33a9.pdfIn PDF document text
    • https://duzikasaropofe.weebly.com/uploads/1/3/4/4/134489835/ecdbfcc8f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f87380314d34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412757/normal_5fa161d0ed5f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417806/normal_5fcff141b219a.pdfIn PDF document text
    • https://gumelajijepepa.weebly.com/uploads/1/3/4/6/134639918/tived.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f9364a417e9f.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/d1405559-9d68-4a4c-a4b5-267887f50669/mario_kart_64_rom_descargar_gratis_para_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42866c4b-e985-4f34-9c0c-6e045540b003/how_to_remove_watermark_from_in_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b7f3d2-3db1-4196-88d8-ac479f13dadc/persona_5_chariot_arcana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/711584a4-11ee-40ec-bd31-a654b9afd25f/kenowimeribut.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_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 5156 bytes
SHA-256: fad10e560bee2aed42fcfea0de5fa94a6b5bed249efcc74ff078440930f19f3f
font_01_sfnt_off0000ed93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 10864 bytes
SHA-256: 9e85b54fc486cff68ff5a7b6f9f77667e7f9d5aa801fa74ee1b256ba465735e8
font_02_sfnt_off000112a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A5 16116 bytes
SHA-256: b2496bc0077c879636d574bbee2d4602aa63378ef56daaa423ce8e1caf54ad98

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