Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ab797f146b88dd…

MALICIOUS

PDF

77.2 KB Created: 2021-03-05 16:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92321096b22e98f9ecdde8751ad0b6c9 SHA-1: b6999a79077e880b3f193c8ffae22229fd390d79 SHA-256: 07ab797f146b88ddb79d7ad8fc28398abfa3146195430b90b665e974ea729197
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a technique often used in link farm or phishing attacks to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to exploit users by leading them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/aws?utm_term=cuisinart+k+cup+coffee+maker+clean+light
    • https://wutodifutatur.weebly.com/uploads/1/3/2/8/132814097/9633025.pdf
    • http://tcerkovniekupola.space/228446934762n8pw.pdf
    • https://neletataw.weebly.com/uploads/1/3/1/3/131398134/f3284edf1a28.pdf
    • https://rabusefikitane.weebly.com/uploads/1/3/5/3/135314736/jonop_nefazel.pdf
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/xovubujez.pdf
    • http://rolutaxab.22web.org/34701832327.pdf
    • http://lnstagramcopyrighthelps.com/nakubinojaludpq57o.pdf
    • http://greatholl.com/xegavemigijapin7z1g.pdf
    • http://metagopu.22web.org/dj_bass_songs_free_naa_songs.pdf
    • http://widuzuduzudovix.iblogger.org/troy_bilt_mustang_50_deck_belt_diagram.pdf
    • http://normab-id.com/what_is_the_main_point_of_federalist_705c5b8.pdf
    • https://gazafakapudon.weebly.com/uploads/1/3/4/3/134345815/31c4d.pdf
    • http://zomuregunaradu.iblogger.org/averages_grouped_data_worksheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_12fa7e1c916a427985d6e9715e9d003e.pdf?index=true
    • http://tudibakigar.epizy.com/dushman_1971_movie_song_free.pdf
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_9ae896b803624ad69246e8525a2a8f72.pdf?index=true
    • http://konapawejiwevin.epizy.com/nevigut.pdf
    • http://wuguxipupez.rf.gd/how_to_set_a_canon_mp25dv_calculator.pdf
    • http://wubiwasomiduxi.epizy.com/49022666362.pdf
    • http://minuwugonobusuw.epizy.com/midedejabidodibazerepufet.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_off0000efef.bin
811b18d6ff167766e045c7c1429014cc38d90e21e8d4478b4a3db5d931defa94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEF 5400 bytes
font_01_sfnt_off00010223.bin
61d3af01c7f29ba043bb6029573272b15cd6b7d60629346abd1f39ed7f1ae6ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10223 10960 bytes

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