Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ac587476298cc4…

MALICIOUS

PDF

76.4 KB Created: 2021-05-07 17:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 706a3638b00fdff4c63b765be56e0bbe SHA-1: 1c91e24d92bafe59bf845608ff453355dd6a1828 SHA-256: a6ac587476298cc44430fbfda725215c554aef0056489e85d0ea6ec2b1b280b6
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to a 'Kenwood ts 450 manual'. The presence of external URIs and the link farm heuristic indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=kenwood+ts+450+manual+espa%25C3%25B1ol PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459935/normal_5fddb069a58f2.pdfIn PDF document text
    • https://tifizadidamoz.weebly.com/uploads/1/3/1/3/131378816/5cbde039c02e38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477873/normal_5fd146f58d446.pdfIn PDF document text
    • https://lapolepep.weebly.com/uploads/1/3/1/4/131406498/2536069.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/zosaroradaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_606156725ab0c.pdfIn PDF document text
    • https://vipoferizapil.weebly.com/uploads/1/3/5/3/135346342/bdb3ee11e98.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/ggdhhic/fashion_tycoon_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/Mhghjux/seabeard_hacks_and_cheats.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/light_reflection_and_refraction_class_10_notes.pdfIn PDF document text
    • https://lepabamun.weebly.com/uploads/1/3/1/6/131636917/4441293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465025/normal_604515061c221.pdfIn PDF document text
    • https://zeduwekikozive.weebly.com/uploads/1/3/6/0/136050246/kubotawujawexawokero.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370087/normal_5ffb0fb9e7431.pdfIn PDF document text
    • https://cdn.sqhk.co/fafojipedul/pvQqhbu/music_player_with_lyrics_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jatomadot.rf.gd/high_achievers_b1.pdfIn PDF document text
    • http://woxikajir.myartsonline.com/dopezojobewiwogemogumod.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/calculations_in_chemistry.pdfIn PDF document text
    • http://lifobem.myartsonline.com/86921211332.pdfIn PDF document text
    • http://pokanusoliviw.epizy.com/18006569605.pdfIn PDF document text
    • http://kavimefejemud.rf.gd/revelation_bible_study_in_tamil.pdfIn PDF document text
    • http://purubonosarule.rf.gd/cantonment_act_1924_pakistan_download.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_off0000e9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A3 5636 bytes
SHA-256: a370577d7e02a12a3b77aa0679b5ad799ac1e2905b109eca651853537db14458
font_01_sfnt_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 11664 bytes
SHA-256: 3315d9695dff7bed77ea1c323903d9edce3c0d84c0008f4de8eaddb109436bdd

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