Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab12b66049386eb…

MALICIOUS

PDF

78.7 KB Created: 2021-03-21 11:12:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b11551f8e3025bba79187d26f8596261 SHA-1: d472442040102063413157fc99cc5f6a62115cbf SHA-256: fab12b66049386ebee78468b1363c89f509ee226ba5198ad917033381c162381
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting it's part of a link farm designed to drive traffic to potentially malicious sites. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs points towards the use of scripting to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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-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://zajinet.ru/wix?keyword=toyota+camry+bulb+guide
    • https://wedikeme.weebly.com/uploads/1/3/1/6/131606111/korotawakugisadanepo.pdf
    • http://mofirixubutibi.getenjoyment.net/vuvemexilemunijedik.pdf
    • https://rivupabageram.weebly.com/uploads/1/3/5/3/135323939/9e740d34.pdf
    • http://desajegurake.scienceontheweb.net/57150313205.pdf
    • http://bolagafub.iblogger.org/woodchuck_chipper_parts_near_me.pdf
    • https://jumaxejew.weebly.com/uploads/1/3/1/6/131606465/4c4b79ad485.pdf
    • http://dovulup.iblogger.org/inferential_comprehension_worksheets_year_7.pdf
    • https://wizugelavuri.weebly.com/uploads/1/3/5/3/135325487/benupoxakos.pdf
    • http://sogejovep.mypressonline.com/bocio_toxico.pdf
    • http://soluzixod.66ghz.com/jazofobekexavenofemi.pdf
    • https://xuvuluvibes.weebly.com/uploads/1/3/4/4/134494650/nakitusasisisegig.pdf
    • http://gafujovinotu.22web.org/event_background_design_template_psd.pdf
    • https://zedetebi.weebly.com/uploads/1/3/1/0/131070456/taketafuku_tabigame_rogala_punevoxumug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/175318a5-4bda-445c-9b12-4141ae8a29c0/bevuzituzujitogali.pdf
    • http://zakefozufasedi.epizy.com/jijomowexibesate.pdf
    • https://ff5ab256-a407-4697-91b9-141751226614.filesusr.com/ugd/4205e4_c7b90bedd17d4d2e8d6e54f21cb45d21.pdf?index=true
    • https://uploads.strikinglycdn.com/files/62eb5c04-edbc-4c47-b7a5-6792baf1efe5/the_practice_room_discord.pdf
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_40d442f3936b4248aefded1182962925.pdf?index=true
    • https://uploads.strikinglycdn.com/files/87525db6-6999-4857-98fb-ded2511399d4/car_maintenance_checklist.pdf
    • http://rizivubonulej.atwebpages.com/13717668255.pdf
    • http://fotizojorirepel.onlinewebshop.net/everybody_wants_to_be_a_cat_clarinet_sheet_music.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_off0000f859.bin
7a5e5e9cbc00c0e288752f024524ff1d4d56a4d3d9a3986ca20d10a2190e3d91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 5272 bytes
font_01_sfnt_off00010a39.bin
d4c1062bc265d9ba703ced712a8fdb506b272e1a41d2e5385cee4919967fa020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A39 10364 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.