Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa48e62963b89a7a…

MALICIOUS

PDF

81.6 KB Created: 2021-09-19 08:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 69495c34cc6298d732ea06a1b8ad31d3 SHA-1: 5abbb52d069c82654a173b380c9be17260de3139 SHA-256: fa48e62963b89a7a3a6307957622eda91ee6407b44fe090105e5758c01e6eb15
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The 'SE_CLICKFIX' heuristic indicates the document employs social engineering by instructing the user to execute a command, likely to download and run a second-stage payload. The numerous embedded URLs on disposable hosting further support a phishing or malicious download campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://smidgel.ru/uplcv?utm_term=modo+a+prueba+de+fallos+samsung PDF link annotation
    • https://thefencedocumentary.ca/adminfiles/file/76019629847.pdfIn PDF document text
    • http://cobmedia.hu/include/womamatoraburexazif.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/wabaxewonumimifudupivux.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/sosokilutezon.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210908090833.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/jewuduxesorotarefusonimok.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/tifixexejijotadetev.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021090723470673499.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/saxakonobutebanoxelu.pdfIn PDF document text
    • https://akemi.ro/hirek/file/xiradi.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/29827461522.pdfIn PDF document text
    • http://mzch.pl/userfiles/file/pesozodezimomogorewir.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/28152550944.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/29201818405.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161345c6cb866b---nutozarazeri.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/65223604752.pdfIn PDF document text
    • http://grasslandtj.com/upload/files/xoropemudogimalas.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/80341012215.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/62520658382.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/panoxovugazomewuxa.pdfIn PDF document text
    • http://lemma-studio.pl/userfiles/file/rotopitanijomok.pdfIn PDF document text
    • https://soudurelausiere.com/upload/editor/file/folanuzebudevuzemew.pdfIn PDF document text
    • https://virker-ikke.dk/files/97971497274.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90C 10884 bytes
SHA-256: b1aad222e30054a401f3ab70c3dbba978e508f690a8c94452b6cd7d35aef79cd
font_01_sfnt_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 18460 bytes
SHA-256: 2270ce386446295010b0de9c8b98d4c8575f6966e210fc4962c2638d1bb100e3
font_02_sfnt_off000120aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1