Malicious PDF — malware analysis report

Static analysis result for SHA-256 4006bad2fd4edc5e…

MALICIOUS

PDF

76.9 KB Created: 2021-03-10 23:11:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f48ab337e483efcfe58961a19425e280 SHA-1: b8f8bad409aca9fb752f2c5bb504c5e647632d58 SHA-256: 4006bad2fd4edc5ea256e7c49d91d3893e2de536138f87b0666fd14dcd00f713
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL distribution suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/award?keyword=atrial+septal+defect+pdf PDF link annotation
    • http://fupodiruza.66ghz.com/idsa_guidelines_pneumonia_aspiration.pdfIn PDF document text
    • http://fesunasisodenod.getenjoyment.net/36022060669.pdfIn PDF document text
    • http://vujavapekebabop.66ghz.com/berkeley_school_of_information_data_science.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/ihhdzbq/bunepujesazutadubuvede.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/ji5dCgj/16273098090.pdfIn PDF document text
    • http://molexepoleku.22web.org/cuales_tipos_de_ecuaciones_cuadraticas_existen.pdfIn PDF document text
    • https://cdn.sqhk.co/fekolisuzub/BhgJUja/big_win_basketball_mod_apk_download.pdfIn PDF document text
    • http://jerunurijo.iblogger.org/tuxomudomovuzafux.pdfIn PDF document text
    • http://xisulekotitis.iblogger.org/jumebewuguwumazegejodis.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/609EviP/dime_como_olvidarte_lyrics.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/how_to_change_oil_on_kubota_svl75.pdfIn PDF document text
    • http://nawoxafibajove.22web.org/baby_bible_stories.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/5fbdffe8-c5ec-42f9-8314-107b1370c7ee/room_booking_software_australia.pdfIn PDF document text
    • http://mulexotuvatago.epizy.com/87167711804.pdfIn PDF document text
    • http://bufurevufazan.epizy.com/68089279806.pdfIn PDF document text
    • http://ravitog.rf.gd/shane_eagle_cutting_corners_music_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8bcbed0-0c6e-4b99-9205-66035d072a1e/honeywell_quietset_tower_fan_replacement_remote.pdfIn PDF document text
    • http://sizikipap.epizy.com/baofeng_bf-_f8hp_manual.pdfIn PDF document text
    • http://dakamonegip.rf.gd/zabajifajagesojewatumofe.pdfIn PDF document text
    • http://fikojopetomex.rf.gd/zepetopoxukudotebafiwi.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/my_cousin_rachel_film_ending_explained.pdfIn PDF document text
    • http://mevutaleb.epizy.com/xijorugamegazu.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_off0000f22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22D 5140 bytes
SHA-256: 60faec71131bb7ca96b466eff567d7e51492ee63c6dee742269901712d457361
font_01_sfnt_off000103b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B9 10144 bytes
SHA-256: 619e4f9eaf5c6a0b36995998d09de76bedbadb2d20a47c020a764d3ce51f1587

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