Malicious PDF — malware analysis report

Static analysis result for SHA-256 922642cdbd8f90a0…

MALICIOUS

PDF

76.1 KB Created: 2021-03-09 14:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ad60a6cf418a8faa9e11ebda9d70bcfe SHA-1: 23e5980e7e39b1f51dc0310c5f01c80096f7be83 SHA-256: 922642cdbd8f90a06fec20396d3a759006561030cc615a27da6e4b61b73a78fa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, designed to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/123?utm_term=minecraft+pocket+edition+server+free PDF link annotation
    • http://jezefumivodasaw.22web.org/what_are_some_examples_of_defensive_driving.pdfIn PDF document text
    • http://kafujaguvo.mygamesonline.org/busitenuwivuwoxigukixini.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/buziv.pdfIn PDF document text
    • http://vabuzunaseridal.iblogger.org/jiboje.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/gagowob.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/how_long_does_navy_training_last_in_nigeria.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojodufiburu.rf.gd/where_i_can_watch_twilight_for_free.pdfIn PDF document text
    • http://webidiwotew.epizy.com/reloading_press_stand_plans.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_27088095be954dbbb641107174292507.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_14b75ce9334a4ad6b36cc73876133d57.pdf?index=trueIn PDF document text
    • http://jidumefimu.rf.gd/fire_suppression_system_design_guide.pdfIn PDF document text
    • http://relurifiluxel.epizy.com/content_plan_template_free.pdfIn PDF document text
    • http://gowatane.rf.gd/maxewifemodosumunitipuvo.pdfIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_3aefc2ee5a9f4d37b261eee6f5f34641.pdf?index=trueIn PDF document text
    • http://xonowazibekaz.epizy.com/fizovamegifuwevimem.pdfIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_03b4e9eadb244406b248c6ff24684501.pdf?index=trueIn PDF document text
    • http://bukarujinadir.epizy.com/2272197344.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_off0000e95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95D 5244 bytes
SHA-256: 45a97ef01596695805cb8676afeb3c601eb25a5a4146a8e98da1d99f12a47ee9
font_01_sfnt_off0000fb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5B 12076 bytes
SHA-256: a13e7cb19d78bd259575e737c096224416c5f577bf32899119d755956b28b47a

Open this report in the interactive analyzer, or submit your own file for analysis.