Malicious PDF — malware analysis report

Static analysis result for SHA-256 de738e2c7d9feb81…

MALICIOUS

PDF

81.2 KB Created: 2021-04-17 04:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6de45ca7fd7b33fb628f5f36ddaf1db4 SHA-1: 0fabcef5b0a1faab6d9808cbd7ef432765e7b1eb SHA-256: de738e2c7d9feb8190e36fc000c8a79d07c918f0688a2a1e1a5af8f863d8e066
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, but no clear instructions or lures are discernible from the readable portion.

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://zajinet.ru/strik?utm_term=what+is+the+best+car+buying+app PDF link annotation
    • http://neriwor.medianewsonline.com/icao_annex_17_download.pdfIn PDF document text
    • https://luxovozudenez.weebly.com/uploads/1/3/4/1/134108910/a47a1d7087.pdfIn PDF document text
    • https://xexibufit.weebly.com/uploads/1/3/0/7/130739933/tefukam-juwadi-roduxewo-tulupimu.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/633919.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/JxQ7Fjg/71534527715.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/pivujajapa.pdfIn PDF document text
    • https://kawifapexevudo.weebly.com/uploads/1/3/4/7/134711131/5007404.pdfIn PDF document text
    • http://epipog.com/88615860166ne8cl.pdfIn PDF document text
    • https://cdn.sqhk.co/wametofenuwo/iig6jam/14760418099.pdfIn PDF document text
    • http://knitfqph.site/super_mario_land_2_dx_rom_online_colore9ris.pdfIn PDF document text
    • http://gitikirazidapi.medianewsonline.com/boss_me_25_manuale_italiano.pdfIn PDF document text
    • http://piredvizhnik.com/nefiseruteroskd2hn.pdfIn PDF document text
    • http://sellforce.ru/xawudizupotilifisehfixc.pdfIn PDF document text
    • https://gidedumewulo.weebly.com/uploads/1/3/5/9/135961218/1244290.pdfIn PDF document text
    • https://cdn.sqhk.co/feziwetesene/jgggfih/wikejadefifejamuvisomuz.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/XygdIjf/how_to_make_knife_handle_with_paracord.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/3918887325.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/pijigorumamafurofumisefo.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/zixav.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_off0000ff3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 5416 bytes
SHA-256: 1375c04ac0be2783576d9dc512b8842f63c6a3f0856b738ee8880dfc32546615
font_01_sfnt_off000111b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B5 10696 bytes
SHA-256: 2abfd2406c574764be754bc2744692efff74975615e2cded796d9bb8c408a08e

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