Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fbf1f6e39c348b…

MALICIOUS

PDF

176.1 KB Created: 2021-03-25 13:20:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f5cedbadebe4af8f5558fbc8a716e37e SHA-1: d45fa7fbd19d216960ef246ecb84bb1ab95449da SHA-256: 82fbf1f6e39c348bae76fa8c908fea05350b2dddcc7216e64488aa27ab8e77fe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'dugedepap.ru', which is identified as a link farm on disposable hosting. This suggests the document's primary purpose is to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/wix?keyword=small+elementary+school+austin PDF link annotation
    • https://cdn.sqhk.co/jizuxadif/fNbaiae/65342359482.pdfIn PDF document text
    • https://cdn.sqhk.co/zokelotosa/FLhaVgt/how_to_report_police_misconduct_anonymously.pdfIn PDF document text
    • http://zaxanoxejem.iblogger.org/jadutukonogusegasob.pdfIn PDF document text
    • http://nibumuxadata.66ghz.com/45686057837.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/zaledibejakelek.pdfIn PDF document text
    • http://rugozuravonabib.22web.org/2014_buick_verano_owners_manual.pdfIn PDF document text
    • http://jijoxep.getenjoyment.net/anti_ulcer_drugs_classification.pdfIn PDF document text
    • http://wezejej.22web.org/how_do_i_change_the_code_on_my_kwikset_smartcode_909.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/z3gg3bJ/66788440213.pdfIn PDF document text
    • http://buzajusefuzasi.22web.org/qualitative_data_analysis_methods.pdfIn PDF document text
    • http://gululujenij.22web.org/1176441692.pdfIn PDF document text
    • https://cdn.sqhk.co/mojuzizimu/ZNziihd/86775779812.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18b5029a-2729-4ac9-8444-fe15f348236f/filedabijosome.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/alphabet_letter_formation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe3c79f-6919-4d5f-841e-ef0bc53eeb9a/dusasasejof.pdfIn PDF document text
    • http://mawidinivetobi.myartsonline.com/gominojaledifejajexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40db5083-156c-4aa8-aa1d-a19ec4881623/29194150920.pdfIn PDF document text
    • http://varaxekewuveza.epizy.com/43470544296.pdfIn PDF document text
    • http://wimarewixogax.epizy.com/ramadan_calendar_2019_pakistan.pdfIn PDF document text
    • http://dezobod.onlinewebshop.net/fivurepusotif.pdfIn PDF document text
    • http://merawaboz.epizy.com/vepipowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce86ab5-dfce-4ba3-90c5-8961a9546062/63093808782.pdfIn PDF document text
    • http://kenalukebuv.epizy.com/how_to_say_new_moon_in_different_languages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0f3004c-d96a-45ca-9b7f-dd3e4f879805/69975029071.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_off00027b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27B62 5244 bytes
SHA-256: a9164d1cbfb6400058a1cb3d8dae3c468683379d1c6953fad6d3b6e03e555089
font_01_sfnt_off00028d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28D0B 11116 bytes
SHA-256: f5750794b903a40ff2eceaf54f43aa0319148462ec82163a9aa7a09cec1fd6e5

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