Malicious PDF — malware analysis report

Static analysis result for SHA-256 7392f60110d68c97…

MALICIOUS

PDF

80.1 KB Created: 2021-03-02 19:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c9082d84f844db56d46137341a97ea40 SHA-1: df87fc79d5a0fa73049bfb943603a293816084aa SHA-256: 7392f60110d68c97a629cf20ab530e49375fae814a45e88a77474e2321dcc409
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'direct material price variance', likely to trick users into clicking malicious links.

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://nipisod.ru/strik?utm_term=what+affects+direct+material+price+variance PDF link annotation
    • http://hayatevesigar.online/xexibewoxeroksqm2v.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/gaje3Xp/nekoxuxevebagaget.pdfIn PDF document text
    • https://cdn.sqhk.co/wevubuse/fa9nQOm/stick_archer_2_mod_apk.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/wopesipaktfe83.pdfIn PDF document text
    • https://cdn.sqhk.co/vimitewimuwi/FgiifYY/best_hypercars_2020.pdfIn PDF document text
    • http://catsism.com/ratio_proportion_worksheetsjgmh2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462362/normal_5ff473d1c7304.pdfIn PDF document text
    • http://anarchymedya.com/vivaldi_summer_presto_piano_sheet_musicacs2w.pdfIn PDF document text
    • http://hhizmet.com/how_to_make_a_production_company_business_planf4g0o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371240/normal_5ff37e023f052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407749/normal_6007294fae866.pdfIn PDF document text
    • http://1xbet-regi.site/80979990123avos5.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/hjjgqGj/school_days_ending_song_lyrics.pdfIn PDF document text
    • http://getsol.xyz/57210392704x0ahk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503387/normal_5fc71999771bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531523/normal_60335688797f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF967 5468 bytes
SHA-256: 10dbc324c743349a5f9308cf79d4e02efacd47bfe3bc5c5127c9bb62f99d4e6f
font_01_sfnt_off00010be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE9 11464 bytes
SHA-256: 0915715e195a05314bcbb6dd1bebf858e17a09de65ea2383014218ac724a278d

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