Malicious PDF — malware analysis report

Static analysis result for SHA-256 0250aabee8cbc4bc…

MALICIOUS

PDF

86.0 KB Created: 2021-03-27 09:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c973199ea730fc7e251d20deeebca8b0 SHA-1: b845ff5e69af69653f04af3399d7f8b3f6ea2e98 SHA-256: 0250aabee8cbc4bcbfd5604f46a0b815e3534538e80242d777ff145986ddfc4f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the primary suspicious URL being lozipotod.ru, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=narrative+analysis+example+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452594/normal_5fef6edcdfe50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_604f966985d28.pdfIn PDF document text
    • http://4kuhd.me/chhello_divas_movie_free61ct6.pdfIn PDF document text
    • http://voirlo.xyz/walmart_photo_printing_times6letv.pdfIn PDF document text
    • http://shimano-stradic.ru/muguvixilasadirirhs.pdfIn PDF document text
    • http://sunny-web.ru/zijitipesowivakabrjrpy.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/cwidhgR/tom_craft_auto_parts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_5ff04c2cdac0d.pdfIn PDF document text
    • https://cdn.sqhk.co/dibatafuba/fgjiXhj/wikajigezazukunuzuw.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/moveturuzuxil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_602469b362557.pdfIn PDF document text
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/3ad779ede92d1b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_6053c9780b2e4.pdfIn PDF document text
    • http://armada.technology/vander_fizyolojisi5gly3.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/h2ieWhj/desukamegezatemuduwav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nojemi/how_much_weight_can_a_2016_nissan_pathfinder_tow.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/defunaneverizepumelud.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/codycross_answers_group_342.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/what_is_the_outdoor_code_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/garmin_vvofit_jr_2_battery_replacement.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001109e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109E 5384 bytes
SHA-256: 3a5e0376957651f73d3614c42714af2eb9c770e82ea5e5bd822d3e8baf361dc4
font_01_sfnt_off000122f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F5 12096 bytes
SHA-256: d50edb8a338e1426bf87a6f4883829f8788ac63d75980bb8de4c780afd69381a

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