Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f2eb7f21d875ef…

MALICIOUS

PDF

84.5 KB Created: 2021-09-12 07:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 808b968f046e5a200da7b2caf875092e SHA-1: 465eace18012e7971e9664bcc565c82032311371 SHA-256: f0f2eb7f21d875efd3d8b83ffb6d63472bbca7430c9db3997d059c8ca5521a57
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_CLICKFIX' heuristic indicates the document likely uses social engineering to trick the user into running a command, such as Win+R, which is a common tactic for downloading and executing further payloads. The presence of numerous external URLs, including one pointing to 'nomylo.ru', suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://nomylo.ru/uplcv?utm_term=pororo+run+game PDF link annotation
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/27108352169.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/xowisifo.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210901_103355.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/5186353348.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/tidif.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/bafalojisovageberopi.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/46601842556.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/dimukivigali.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/vetevageverozexiwafowisep.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38752727302.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/12596567004.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/95473513114.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/taloxavebek.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/27944112108.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/90698758913.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/nugok.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090702530512.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/feputezozo.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/77976132620.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/jawepozalopax.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/poxonujajidifekavizusipor.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/xanuwalutoruziputetenub.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/44229591896.pdfIn PDF document text
    • http://fourfoods.com/images/files/wijukexekos.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72F 10148 bytes
SHA-256: f94b5af4ece7785dc583250212842eb422f723fc664a694de7212c266069d4f7
font_01_sfnt_off0000fdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD4 18244 bytes
SHA-256: d83a3ec09a16d49510368913beeba61421191c2b365f44c58fdc47cb49113515
font_02_sfnt_off00012c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1