Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd2fe057d28211f…

MALICIOUS

PDF

82.3 KB Created: 2021-04-02 18:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5a6ce24d40683df188755a5854c337a5 SHA-1: d0ed344fcc6e77d0303900df4076a3c0eed09fb0 SHA-256: 5fd2fe057d28211fe0e521aeed5c2533452d8f6ebbe0a6094b0a46bf3f6ea052
126 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high number of embedded URLs. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of numerous external links points to an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://jacksth.ru/strik?utm_term=how+to+recycle+shredded+paper+republic+services PDF link annotation
    • https://cdn.sqhk.co/vujenibolo/4TieEhi/mr_love_queen_s_choice_anime_crunchyroll.pdfIn PDF document text
    • http://goxutasabadatum.sportsontheweb.net/92011720807.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/nZje9he/fexujanizetexo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446759/normal_600d8accd6abb.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/model_3_vs_model_s_interior_space.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/PichcXN/26128796307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_605f641102718.pdfIn PDF document text
    • http://retamos.mygamesonline.org/dubevudedi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417659/normal_6001fad54de30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413976/normal_5fe5d2215363a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5fe80378e0fbe.pdfIn PDF document text
    • http://mezogevap.mypressonline.com/jigopozekelopudomojago.pdfIn PDF document text
    • https://cdn.sqhk.co/raxedaninaso/aGajdid/electrical_schematics_symbols.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462730/normal_604d90610b35c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_601ffe72aaf13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369930/normal_5ff26012e305c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_60362bb1b3d9f.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/eijgchf/budoxabatoxetasir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://da25564d-e3c2-4b9b-87ba-dd8ce2ae78d4.filesusr.com/ugd/c82cd6_5755b3aa11914cacb06e8ac448565639.pdf?index=trueIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_85c24521fb974b5689e97033cb382f96.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_a6710a3729d3429e86ed7740dcd0472f.pdf?index=trueIn PDF document text
    • http://sekuwomexapa.myartsonline.com/waxurujavuxobolikokomejug.pdfIn PDF document text
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_2018e1880e3c4d5aac13b4be9fc8f75d.pdf?index=trueIn PDF document text
    • http://matunojusorim.epizy.com/xosidazibevo.pdfIn PDF document text
    • http://pepabalexesoge.rf.gd/journalist_reporter_resume.pdfIn PDF document text
    • http://wivifizurata.epizy.com/collaborating_and_partnering_interview_questions_and_answers.pdfIn PDF document text
    • http://kepipejesa.epizy.com/gomafo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AD 5292 bytes
SHA-256: d8f3996e865796a4697cff1808f77c31440d55aedfdaa0f279d5091c0a660af7
font_01_sfnt_off000109cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CF 10232 bytes
SHA-256: 03aa15ae5d622b572f5f27e0e6e8e38d6fd764c65ec1c2ecee84bb66057c269b
font_02_sfnt_off00012cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c