Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a57a6ccb524f509…

MALICIOUS

PDF

76.6 KB Created: 2020-12-28 22:27:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8192772c312b1cac8c7dc96c8318c32f SHA-1: 1efe6d647338ccad107459c566b4aa42f66ad4fe SHA-256: 9a57a6ccb524f509ca3e66d37cffe715656a235aeb9ec354f476fff1071e7db9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains heuristics indicating it is part of an advance-fee scam, using lottery or prize language combined with parcel delivery requirements. It also contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://trafftec.ru/123?utm_term=nba+2k13+jersey+cheat+codes
    • https://munivimisidifi.weebly.com/uploads/1/3/4/7/134772296/7506c284ec.pdf
    • https://cdn.sqhk.co/goluxewimabu/pHhirjb/the_maze_runner_3_full_movie_free_download.pdf
    • https://mukoxawav.weebly.com/uploads/1/3/4/6/134627731/2ae3d00.pdf
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5fa4523041ddf.pdf
    • https://cdn.sqhk.co/soredepel/briaqLj/43676231304.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cb472e4c-df19-4e2d-b4e9-a8a5f58c6afd/sunpak_digiflash_3000_instructions.pdf
    • https://uploads.strikinglycdn.com/files/0fcf97cd-47d9-41fe-92ad-10a4c999d51d/96299109065.pdf
    • https://uploads.strikinglycdn.com/files/d6cac05a-20b3-4705-8f4c-4c90dd438d8a/how_to_bypass_online_surveys.pdf
    • https://uploads.strikinglycdn.com/files/2bd4d528-8332-40cc-98d2-0162a39a8972/kakinosusunikosez.pdf
    • https://s3.amazonaws.com/ragejufa/jelaripaxelesavot.pdf
    • https://uploads.strikinglycdn.com/files/2b492192-07b8-41d5-b892-a0b95a24051e/8461917559.pdf
    • https://uploads.strikinglycdn.com/files/110fd33f-4e62-4ff2-98eb-91e78c117fff/54570946893.pdf
    • https://uploads.strikinglycdn.com/files/1417ad5d-955b-48ef-af04-576256204364/67696420337.pdf
    • https://uploads.strikinglycdn.com/files/54132d33-662f-414f-bc7d-0c27bfbfcc7b/centennial_hall_umn.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e006.bin
fad1913dea388df54ac63fd9cb3a635b35c46382ba92171e3951f98486b40130		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE006 2972 bytes
font_01_sfnt_off0000ea9a.bin
ac144299c0b9bd2d6a5653e14ccf4274a11dd9ecd28f492d88f37c73a336086f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 5692 bytes
font_02_sfnt_off0000fe11.bin
27d9bd0c9243101417aa8adf8641399b90a3b90ad3f0113716faf08f096a8f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 11060 bytes

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