Malicious PDF — malware analysis report

Static analysis result for SHA-256 064f4aa1e52064c4…

MALICIOUS

PDF

79.0 KB Created: 2021-02-24 10:02:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 837599a870f77021ced00f17d4b9a0ce SHA-1: 278518f4d9577ab183420ea4fecbe5d63348f440 SHA-256: 064f4aa1e52064c49bb5d9c4c51f25d9d181761b0402685d204381f83ab4f6a3
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to disposable hosting and link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to trick users into visiting malicious 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 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://bologen.ru/123?utm_term=orbit+4+station+timer+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/pafatewodoju/auHjoAx/green_corduroy_pants_mens.pdfIn PDF document text
    • https://kekoluborefox.weebly.com/uploads/1/3/5/3/135327445/72c366d929.pdfIn PDF document text
    • https://povebosi.weebly.com/uploads/1/3/5/3/135346093/surowex_mijarovoz_nobomuze_xojelozobinijo.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/Plhj09d/line_tower_wars_ai_warcraft_3.pdfIn PDF document text
    • http://basiditdcf.space/28527133250rzvsk.pdfIn PDF document text
    • https://cdn.sqhk.co/zapakolozu/Ghhjbji/wardrobe_furniture_design_images.pdfIn PDF document text
    • http://trokot-online.xyz/zuxujigelaukfn.pdfIn PDF document text
    • https://rugepokowefi.weebly.com/uploads/1/3/5/2/135294276/nufasofodu-zixerer-xujomev-nekobotitotuwum.pdfIn PDF document text
    • http://tapalofaxag.22web.org/bhojpuri_latest_movie_apps.pdfIn PDF document text
    • http://logvoz.ru/biochemistry_satyanarayana_freevars1.pdfIn PDF document text
    • http://siankaanmexico.com/54918937392sd388.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/jeghghj/tap_titans_2_best_artifacts_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/genukopapovixo/busqueda_de_informacion_en_internet_definicion.pdfIn PDF document text
    • http://dunaditi.rf.gd/83550489116.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/bosch_classixx_5_instrukcja.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/horowitz_fisa_report_news.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 5324 bytes
SHA-256: 2e77aae5127fad8c6cb2f38784254c2df7170210b8a1f4eadae2cbd5dead6ec7
font_01_sfnt_off0000fa5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5A 11508 bytes
SHA-256: 409960613dcaf9a742dd4d7ee764ea40e661cf67d6e3412f0b110ff85745fedf
font_02_sfnt_off0001209a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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