Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25925c928317a57…

MALICIOUS

PDF

95.1 KB Created: 2021-02-25 21:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6244091015f5945d2cd9d9c817c3c247 SHA-1: 4819fad8da7f67e5493e33bd86ec8921b3c2cfca SHA-256: b25925c928317a57378d9d454b7dca2626b9b6ce6e7d7ed50a4be9ab37fc41ab
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded links suggest an attempt to redirect users to potentially malicious content or engage in SEO manipulation, rather than delivering a direct exploit.

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 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://leonvi.ru/123?utm_term=which+chromosome+has+the+most+genes PDF link annotation
    • https://cdn.sqhk.co/gutifusuf/YZpjiib/nevegatuxamero.pdfIn PDF document text
    • https://jibanexoruna.weebly.com/uploads/1/3/5/3/135338247/5532630.pdfIn PDF document text
    • http://findssldz.xyz/como_se_ordena_la_historia4epd9.pdfIn PDF document text
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/gewisowisubamux-lekokerodugo-rokuparo.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/vamulapepiletexabepani.pdfIn PDF document text
    • http://vanlit.ru/pendragon_character_sheet_exceltdcir.pdfIn PDF document text
    • https://pakowojazawari.weebly.com/uploads/1/3/0/7/130775116/lodenubomosebaj.pdfIn PDF document text
    • https://nedamekiwuj.weebly.com/uploads/1/3/1/3/131379605/xikolila.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/dumudopubame.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/aDgdhiP/singing_pumpkins_projector_download.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/marla_maples_age.pdfIn PDF document text
    • http://pornbustyvids.com/buzz_cut_women_s_hair_carewgjtl.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/fefurorobumi/mass_media_advertising.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/jofuta.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/telford_infant_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/teacher_s_guide_math_10_module_2.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/lithium_ion_battery_safety_data_sheet.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/clock_templates_to_print.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13441 5192 bytes
SHA-256: ec9906d6d230743b562c2e9aafdfadd342a910f360f0da09d61add06e53e24da
font_01_sfnt_off000145d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D0 13004 bytes
SHA-256: 773eaa76b7786ccdd342e1b63a79f7ba3bc817be585d8ac3b3657544ab003feb

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