Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f02017f8c3cf2b4…

MALICIOUS

PDF

78.8 KB Created: 2021-02-14 23:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 33866485f0f8bbe24fd1ee287c47a25d SHA-1: 49aaa65ecb53d6bb24482ef6f3c860dda309af17 SHA-256: 6f02017f8c3cf2b4687a72bb666ab4289fcca3ccfeceb5ee279edfdb5d2628cd
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains embedded URLs, including one pointing to 'jacksth.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to an 'installation manual'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a malicious intent to redirect users to potentially harmful content.

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://jacksth.ru/wix?keyword=viper+5x05+installation+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495685/normal_5ff27399e372f.pdfIn PDF document text
    • http://firstreadersclub.com/google_maps_english_versiont0rqz.pdfIn PDF document text
    • http://fashion-deals.xyz/pawarezibiwey55c9.pdfIn PDF document text
    • http://milano-moda.space/pcb_design_proteusi1f2f.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/Ohfiahf/4_in_a_row_king.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_6021abc92cfa4.pdfIn PDF document text
    • http://soteguziropuku.22web.org/que_es_el_tropismo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_5fe68fba4c759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5fd3a86029485.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5fdf00ef09315.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/gg4hgVg/paxlava_salon_vaz_2107.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/R3oZpCx/ivry_hall_alabama.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagonunanu.epizy.com/certificate_of_appreciation_sample_format.pdfIn PDF document text
    • http://ravawubiralimiw.rf.gd/76459511795.pdfIn PDF document text
    • http://xavisijividefo.epizy.com/wopinaloxebewofil.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_off0000f8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D6 5264 bytes
SHA-256: 112af8a1d7c108f0cac48b8dd3f92b3a7513a86a6d4206e2fda3a50c5f080b50
font_01_sfnt_off00010ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 10296 bytes
SHA-256: 96e2dc750f19a48592ace6421aab7ed4bdbd4e9647b786ff24a46760453a624e

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