Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f3e26241239511…

MALICIOUS

PDF

121.7 KB Created: 2021-04-10 05:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 32b5b1a6d6f8715d7b0412fad8c36569 SHA-1: aafa5b5e9773606f95cff0cceabd0889e4a81a84 SHA-256: 83f3e2624123951140bde8454833e0e6c92ca6867810dd6ddc19db915d208373
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dugedepap.ru/strik?utm_term=spektrum+dxe+programming+cable PDF link annotation
    • http://widalatipuna.22web.org/lirowokumamobonivajus.pdfIn PDF document text
    • http://naturalm.space/41425875632kf6ja.pdfIn PDF document text
    • http://eslife.pro/power_cooker_xl_recipes_chickenfulid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393489/normal_5ffd28e08f53a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_600dea15713e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_606b5f32a3ada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464851/normal_600c0d83127c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_602c16393ae0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_605b67fed7242.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368242/normal_5ff310ed24856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447460/normal_5fdb02c07f231.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480880/normal_5fcb71691758c.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/fluke_t5-600_not_working.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/zogesug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavuradisaxel.epizy.com/alien_shooter_2_cheats.pdfIn PDF document text
    • http://norenuwidubeg.rf.gd/haileybury_turnford_school_ofsted_report.pdfIn PDF document text
    • http://kafuvaxuxele.epizy.com/murejaw.pdfIn PDF document text
    • http://jokosen.atwebpages.com/iso_22000_2019.pdfIn PDF document text
    • http://vamosipegib.rf.gd/housing_development_business_plan.pdfIn PDF document text
    • http://nalejunubotuw.rf.gd/aliphatic_nucleophilic_substitution_reaction.pdfIn PDF document text
    • http://bikaxubu.rf.gd/11943992706.pdfIn PDF document text
    • http://gotipubejajod.rf.gd/xivizodoju.pdfIn PDF document text
    • http://jazosorolanik.rf.gd/james_patterson_books_list.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_off00018179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18179 7620 bytes
SHA-256: d2508ad11c853236db2c48f72f007f219b90c043b0048995ac293743e1be0f06
font_01_sfnt_off00019a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A7E 5588 bytes
SHA-256: 1fee0f49ce561094a1aacb94850865226682d176435133e0c565bffc794e0809
font_02_sfnt_off0001ad6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD6B 13284 bytes
SHA-256: 81892cea894265ce2b469e94a5ca119ac6c51c3b7ebb2760c44fa892938d7567

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