Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f2929b861ffda3…

MALICIOUS

PDF

80.4 KB Created: 2021-03-28 21:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1169a0b3beac1f9caf55aed34b085c77 SHA-1: e75e51f8b8a8a4d390d8c3214202282af28024c0 SHA-256: e5f2929b861ffda3babfe9d8ae725494ee7ae1e22f661364f4340a222ed3fba8
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically a URL that mimics a search result for a PDF download. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection profile point towards a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://pelibifir.ru/wix?keyword=a+mother%2527s+reckoning+pdf+download
    • http://mixezitubut.mygamesonline.org/genetics_exam_questions.pdf
    • https://cdn.sqhk.co/kubabulukod/jcifgcz/wodabad.pdf
    • https://cdn.sqhk.co/xuwifoviwalo/0ojfqjj/server_2016_remote_desktop_not_working.pdf
    • http://vuvulusigi.scienceontheweb.net/60464727100.pdf
    • https://cdn.sqhk.co/libibajuzumu/j5jcgiW/36923623310.pdf
    • https://cdn.sqhk.co/pinofizulag/cAjiL1S/narivaxivimok.pdf
    • https://cdn.sqhk.co/rotelizedo/ajcjbhe/10553116833.pdf
    • http://jisutuxoxaza.medianewsonline.com/80676971498.pdf
    • http://vizemezezu.sportsontheweb.net/cats_claw_creeper.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9e371d10-ee07-48e8-a593-0ee4728dcd5a/puzifavosojilitaw.pdf
    • http://pojozija.onlinewebshop.net/lawetamasilozaja.pdf
    • https://uploads.strikinglycdn.com/files/26253abc-3a63-4742-af7b-99971fbf368a/pedovaferikufud.pdf
    • https://uploads.strikinglycdn.com/files/8ac10fc8-9f9f-4bd6-8e22-b24419220bbe/61945601950.pdf
    • http://gudukamu.rf.gd/flipkart_bedsheet_dikhao.pdf
    • http://defakulid.atwebpages.com/how_to_set_up_night_owl_security_camera_on_phone.pdf
    • http://xapitolo.rf.gd/embed_animated_gif_into.pdf
    • http://suredutika.rf.gd/bahubali_cinema_telugu_lo_ing.pdf
    • http://vexabimumemig.atwebpages.com/40449250984.pdf
    • https://uploads.strikinglycdn.com/files/2a3b4a4a-87c7-4c10-a7a6-216580d7392a/mazoze.pdf
    • http://sufofivisis.epizy.com/intcos2x_sin_xcos_x2dx_is_equal_to.pdf
    • http://feniwuzisegutol.rf.gd/baazaar_2018_full_movie_filmyzilla.pdf
    • http://gozudil.onlinewebshop.net/55474755044.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef31.bin
9c79203ae2ba5708cc5ce444e1b0559d89f9029532d53fb5211b5602b1e2e25a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF31 3440 bytes
font_01_sfnt_off0000fb4a.bin
4ee873b3ae738ef3b88aad718b14c561b4a4b26fd35eb2b627698ea53d6ccad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 5748 bytes
font_02_sfnt_off00010ece.bin
02e9bb370b6f690d979c8d5c493d4ce15ddc6f0d65bba073b071824a6834f536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECE 10816 bytes

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