Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c22372c30c17f19…

MALICIOUS

PDF

72.8 KB Created: 2021-02-21 08:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d5c893c769c6578506cdaf89140fb718 SHA-1: 679796320ad2fed4a05e40d0133efc8c5e072840 SHA-256: 5c22372c30c17f1991d3cdb88e3e1eb2d7e33a959daf7894908b1dab4d03507e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wb?keyword=jamie%20eason%20live%20fit%20phase%201%20day%201 In PDF document text
    • https://gikatufezido.weebly.com/uploads/1/3/4/3/134338368/d64b23.pdfIn PDF document text
    • https://razijidepafex.weebly.com/uploads/1/3/4/8/134891772/wowovalaz.pdfIn PDF document text
    • https://wanusasa.weebly.com/uploads/1/3/1/0/131070791/c6119057d105.pdfIn PDF document text
    • https://takibuvekinapix.weebly.com/uploads/1/3/4/4/134456834/6578379.pdfIn PDF document text
    • https://sikediluselifa.weebly.com/uploads/1/3/1/6/131636826/nedaxiruvov.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/ojaYjfD/emerald_armor_mod_for_minecraft_pe.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/cjghege/emoji_square_with_x_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/lomabufu/qmIcKge/dilunu.pdfIn PDF document text
    • https://cdn.sqhk.co/ganidabizi/cW7hgbO/gem_mineral_show_macomb_community_college.pdfIn PDF document text
    • https://rigugoxa.weebly.com/uploads/1/3/0/7/130776225/belepo_nelufarofova_tekixemimuvam.pdfIn PDF document text
    • http://activa-fb.com/dewuxerup57sf9.pdfIn PDF document text
    • http://khanapoorti.com/distinguish_between_effectiveness_and_efficiencyibd2z.pdfIn PDF document text
    • https://cdn.sqhk.co/nigalasiline/csgeghh/18850737529.pdfIn PDF document text
    • https://vopuxobud.weebly.com/uploads/1/3/5/9/135974080/3280449.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xavimew.rf.gd/97082544.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_off0000deba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBA 5388 bytes
SHA-256: 63c5d131071c3116e961bca39e659e00ec0b6e915033a214a9b4aadfe5699110
font_01_sfnt_off0000f107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF107 10948 bytes
SHA-256: 5b3620b451882d57c47ef7f508949998f0003475361cf13517d0b41123850e05

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