Malicious PDF — malware analysis report

Static analysis result for SHA-256 725ae58d9a0aa3b2…

MALICIOUS

PDF

78.3 KB Created: 2021-04-03 07:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 976e68109871cf2adcc14c480bbb56ac SHA-1: 2cdac47b2f45e7240a11754c5a6ff0af66c20761 SHA-256: 725ae58d9a0aa3b282c38e1bba5286c4277f931ec56bb39743c1fa72b8929dcd
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic PDF_SEO_LINK_FARM indicates a large number of links, and one of the primary URLs, https://kuzutuzo.ru/strik?utm_term=hp+probook+6570b+core+i7+price+in+pakistan, suggests a lure related to product pricing. ClamAV also detected this as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=hp+probook+6570b+core+i7+price+in+pakistan
    • https://gofegupozomo.weebly.com/uploads/1/3/4/4/134479888/noxefarupadilewubiri.pdf
    • https://static.s123-cdn-static.com/uploads/4489713/normal_5ff273b27c9b3.pdf
    • http://popisazono.getenjoyment.net/sikejuwodovemokate.pdf
    • https://static.s123-cdn-static.com/uploads/4413573/normal_5feeb0528ddc5.pdf
    • https://cdn-cms.f-static.net/uploads/4497395/normal_603902d4670b3.pdf
    • https://suligabewe.weebly.com/uploads/1/3/4/0/134040343/meperan-jemorup-zokefikekigi-lutegen.pdf
    • https://xavuzilutose.weebly.com/uploads/1/3/1/0/131070872/9209667.pdf
    • https://cdn-cms.f-static.net/uploads/4473053/normal_5fea3cdb47a7c.pdf
    • https://gikunagab.weebly.com/uploads/1/3/0/7/130738902/munirukanaf.pdf
    • https://cdn-cms.f-static.net/uploads/4373997/normal_600e32c3e60d4.pdf
    • https://nijuvabuf.weebly.com/uploads/1/3/5/3/135326727/f139983f0ca9.pdf
    • http://tomolijoponix.mypressonline.com/how_do_you_redeem_pokemon_code_cards.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vogubivajavofu/crash_course_chemistry_periodic_table_worksheet.pdf
    • http://jadukubilelib.myartsonline.com/balancing_redox_reactions_worksheet.pdf
    • https://s3.amazonaws.com/negonanopix/virizazimawojepinaweze.pdf
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_40afd0e93df74aaf91f9b01e9189f4cc.pdf?index=true
    • https://s3.amazonaws.com/wiwamoxamo/89934746140.pdf
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_7b3250254dda43b58f45865f58de320c.pdf?index=true
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_fa12fbe001ee4f2f8095d79be94d9013.pdf?index=true
    • https://s3.amazonaws.com/tojazudibumogab/25394459568.pdf
    • https://s3.amazonaws.com/bofake/sosukupukokorugemafip.pdf
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_5db91fc522654c07a0a75413d7513f0e.pdf?index=true
    • https://s3.amazonaws.com/pozokimepe/budget_sheet_google_sheets.pdf
    • https://s3.amazonaws.com/pokorevalaxex/56349244505.pdf
    • https://s3.amazonaws.com/kegovev/la_senza_bra_measuring_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f28a.bin
d65fb0a1ea6be53a93121bc188645a0f9e6af30a1f989596b2ef6fd6b203085d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF28A 5560 bytes
font_01_sfnt_off00010585.bin
54df808803330f616c503430eb14c395075cf84ad49ddce789d8bb9b84c9350e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10585 10676 bytes

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