Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03279347b9d9835…

MALICIOUS

PDF

103.0 KB Created: 2021-03-25 21:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2151cac61251891de0ad709f660ae43 SHA-1: f10811a35ac5e34f7650d7668e8e89a564967edb SHA-256: c03279347b9d9835e27ab3d3d4491ba99526bf12568eb26b23b95794b0578afd
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, leveraging lottery or prize lures combined with parcel delivery requirements. It contains a large number of external links, many of which are likely part of a link farm designed to improve SEO for malicious content. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to phishing or malware sites.

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://xezojetit.ru/award?keyword=ali+baba+and+the+40+thieves+book+pdf
    • https://static.s123-cdn-static.com/uploads/4385021/normal_5ff4d15e352c3.pdf
    • https://nitejaxerovon.weebly.com/uploads/1/3/1/3/131379530/76d7a6.pdf
    • https://cdn-cms.f-static.net/uploads/4405419/normal_600edd3335bae.pdf
    • https://cdn-cms.f-static.net/uploads/4369302/normal_603376663f2ea.pdf
    • https://dapiridefurewej.weebly.com/uploads/1/3/5/9/135987432/nakaratajuf_rumazumipov_gowijeworafaj_fuxaguxupupo.pdf
    • https://cdn-cms.f-static.net/uploads/4427091/normal_601e147e575cd.pdf
    • https://savatevadenu.weebly.com/uploads/1/3/1/4/131452836/3615744.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2e675f2c-1b27-430d-97b3-fb98ef674265/can_i_play_minecraft_java_for_free.pdf
    • https://uploads.strikinglycdn.com/files/3e821683-a2b3-4c1b-8198-b843dfca7a1c/gagasib.pdf
    • https://s3.amazonaws.com/simujix/how_to_convert_jpg_image_to_on_macbook.pdf
    • https://s3.amazonaws.com/xoferuzu/pebokituxakal.pdf
    • https://s3.amazonaws.com/gowupuzokowuxes/97357529587.pdf
    • https://s3.amazonaws.com/lunojol/rasubikuxumuwedu.pdf
    • https://s3.amazonaws.com/makixibawumebol/wanazenodugarala.pdf
    • https://uploads.strikinglycdn.com/files/0e5c4b71-ff0f-4e70-8bd7-914b5df765ba/winelidodexonusakowesofe.pdf
    • https://s3.amazonaws.com/geradi/dilazajepalis.pdf
    • https://uploads.strikinglycdn.com/files/3579276f-37cc-4766-ae30-a2bf0e5b7eaa/74285447193.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_off000158bf.bin
b6354e8253c71593ecb6ee17b08d8906817e0bbb77c396ba1a3100aaf18f1d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158BF 5516 bytes
font_01_sfnt_off00016b82.bin
19cfed15362918efbfabdd597395429a89bb252b95273b1e21403b54d9f272b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B82 10424 bytes

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