Malicious PDF — malware analysis report

Static analysis result for SHA-256 2911d602b2d4a55e…

MALICIOUS

PDF

100.2 KB Created: 2021-03-31 11:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a189d32f140f9e7fd74445040cbf8470 SHA-1: 459068eaf9845054f94e2f567e3b6ffa845b5451 SHA-256: 2911d602b2d4a55e6aeff9e645ce318a65a8028209d289f3ebe29c009c6300af
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a large external link farm. The embedded URLs, such as https://leonvi.ru/wix?keyword=metv+on+directv+2020, suggest a phishing or SEO spam tactic. The ClamAV detection and ML classifier further support its malicious nature, indicating it likely serves as a lure to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://leonvi.ru/wix?keyword=metv+on+directv+2020
    • https://nixalimug.weebly.com/uploads/1/3/2/6/132680811/tunugukeli_bomelig_rexojenuxiwo_wesulevivonera.pdf
    • https://cdn-cms.f-static.net/uploads/4386337/normal_6017952874b54.pdf
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/xewizawerugejako.pdf
    • https://wibixebaroz.weebly.com/uploads/1/3/1/8/131856543/6131b.pdf
    • http://winoorama.fun/wenedanosakitunosezgopdj.pdf
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5fc893271b6b8.pdf
    • https://static.s123-cdn-static.com/uploads/4426413/normal_5fcc573d5d67b.pdf
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/9538672.pdf
    • http://unityfree.xyz/ejercicios_de_suma_y_resta_para_imprimirief0v.pdf
    • https://static.s123-cdn-static.com/uploads/4455196/normal_5fee9eec6d376.pdf
    • http://abzac.me/4939493517pfm2n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/9c043514-92b3-4a4b-94a4-e6649ad125a8/2623194284.pdf
    • https://uploads.strikinglycdn.com/files/ca739e5f-60e1-450c-914f-e981f4fa103f/gobobosifigeru.pdf
    • https://s3.amazonaws.com/vavapekadoliti/24849296111.pdf
    • https://s3.amazonaws.com/genijusemu/premade_dd_campaign_5e_free.pdf
    • https://uploads.strikinglycdn.com/files/eb6a7b34-6d0c-4937-8f3b-9bd53c34a19f/sofomusegubujosigifes.pdf
    • https://s3.amazonaws.com/julexekubaj/934553532.pdf
    • https://s3.amazonaws.com/ximupuv/tunadopivekib.pdf
    • https://s3.amazonaws.com/viregujipowuru/10620829883.pdf
    • https://s3.amazonaws.com/fikuvine/7456567341.pdf
    • https://uploads.strikinglycdn.com/files/b75f8fcf-fbbb-4605-a7d3-be5ec3ff7c63/yard_machines_lawn_mower_repair_near_me.pdf
    • https://s3.amazonaws.com/libusamagowuvo/rororepekafoji.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_off00013e02.bin
174cb5fffb839877098888fb09f3bc0369fc5da9944ed56507dd4654fd7f3e50
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E02 4640 bytes
font_01_sfnt_off00014de2.bin
54d7269bd576098c6df29510953d8fa10f5b4d7c618536bdb66edd8d9c021569
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE2 11648 bytes
font_02_sfnt_off00017566.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x17566 4324 bytes