Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c377edaed97e61e…

MALICIOUS

PDF

67.0 KB Created: 2020-11-26 21:48:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1bec5bdd2ffeddb4c15f77891bad27f SHA-1: 72c0b421de4f9ade06efcd15218afa961cc7aafe SHA-256: 0c377edaed97e61e4834db26e5b4f5108873783c519e414acad089e276b57af6
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various URLs. One of these URLs, 'https://traffking.ru/123?utm_term=niagara+fire+wire', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://traffking.ru/123?utm_term=niagara+fire+wire
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f8d2bedea3be.pdf
    • https://wowumasoz.weebly.com/uploads/1/3/4/3/134310839/vewatomejukedawasa.pdf
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f874bae82369.pdf
    • https://cdn-cms.f-static.net/uploads/4444623/normal_5f9e5813a6f70.pdf
    • https://cdn-cms.f-static.net/uploads/4468571/normal_5fad4945a1053.pdf
    • https://setibadumizokeg.weebly.com/uploads/1/3/4/8/134880372/4641513.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f2c3d50b-0e09-4297-8fe0-34fd796cdd87/97720253345.pdf
    • https://uploads.strikinglycdn.com/files/bbcc7687-7e35-464f-a5c8-b1ec81cc7481/a1392_airport_express_manual.pdf
    • https://s3.amazonaws.com/zidenigad/40078976320.pdf
    • https://uploads.strikinglycdn.com/files/1832d5fe-44c1-480f-a732-85cd20ef9fee/88925333712.pdf
    • https://uploads.strikinglycdn.com/files/4ef832cf-2111-48b7-a9c1-fbdc80e2d84a/my_hero_academia_season_4_ep_22_dub.pdf
    • https://uploads.strikinglycdn.com/files/1ebb1e17-b40f-4d19-ba0f-2259cb1a4ccf/swann_plus_for_windows.pdf
    • https://s3.amazonaws.com/tetazino/atlas_of_human_anatomy_for_the_artist.pdf
    • https://s3.amazonaws.com/divelatoxa/xuwitugala.pdf
    • https://uploads.strikinglycdn.com/files/628c7717-7ca4-4f1a-bb2a-42573d2336f8/go_math_grade_5_chapter_11_test.pdf
    • https://s3.amazonaws.com/voxipanovigepiv/11103724452.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae8.bin
57f80705fafdafd4938d947888384b4ddc438c4635194a365fe4917a4d4cc0bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE8 4784 bytes
font_01_sfnt_off0000db5d.bin
a47d8949dca337f65b9548decb346c44370f1ecd9cf89c350e91fa6c0d4ecd38
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5D 10708 bytes