Malicious PDF — malware analysis report

Static analysis result for SHA-256 12356e62c40b61a4…

MALICIOUS

PDF

91.3 KB Created: 2021-01-29 21:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c246b310bad53f639bb3e2fd6610c99b SHA-1: f736bf479734a3efe803663d8b2bf1779b60f95c SHA-256: 12356e62c40b61a4d1db9382d7fe81d5ff2059d00d474597af0ef84a51e022a6
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure (ggtraff.ru). The document body, though heavily obfuscated, appears to reference a book title, suggesting a lure to disguise the malicious links. The presence of multiple disposable hosting domains and link farms further indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/wb?keyword=skulduggery%20pleasant%20book%2011 In PDF document text
    • http://top-odejda.com/sopolisusojokikujary3d5w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493867/normal_5fcdd87f300fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373986/normal_5ffc93e3ea696.pdfIn PDF document text
    • https://cdn.sqhk.co/vunofufi/hfhhMLU/50043542066.pdfIn PDF document text
    • http://love-cosmetics.shop/metallurgy_multiple_choice_questions8ceg7.pdfIn PDF document text
    • http://igcopyrightforhelps.com/18033482723przcp.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/kLAhh7U/37902671004.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387698/normal_5fefc9aeaca9b.pdfIn PDF document text
    • http://sale20.site/vamiriramidanigigu02x8o.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/ia2xjaa/medewurubolagofowuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383574/normal_5fe20ff6c6b77.pdfIn PDF document text
    • http://sunshop.pro/shutterstock_link_generatorcs34e.pdfIn PDF document text
    • http://wersita.fun/61615693423q2hsm.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/jamajawevubilutawetikikd7nhm.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/ggjgujd/90207072745.pdfIn PDF document text
    • http://wersita.space/game_of_sultans_gift_code_free_2020pzcp6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481518/normal_5fd2d1ac3ad76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jasixerebav.epizy.com/12026005384.pdfIn PDF document text
    • http://pexedidal.rf.gd/imei_number_check_android_online.pdfIn PDF document text
    • http://gedawov.epizy.com/google_play_store_stuck_at_100.pdfIn PDF document text
    • http://xesogopobatobop.epizy.com/xegixelixo.pdfIn PDF document text
    • http://simipibenafar.epizy.com/powerpoint_webinar_templates.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_off00012787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12787 5588 bytes
SHA-256: dd80c4c9a8ca2188879b844e99661008eb83eb3dec5bf7202921e38d7d4cba25
font_01_sfnt_off00013a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9D 10768 bytes
SHA-256: d3bae78f545bf63577bf4638f2642184152efe140fb8056527c72c9c255aa7e9

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