Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fac3dcfae7700d1…

MALICIOUS

PDF

73.4 KB Created: 2021-10-07 02:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9620e0f2e726ad170dcb85774f405398 SHA-1: eca709f025d9f12afe83e9477acc7e7f6d383af2 SHA-256: 6fac3dcfae7700d1940c71336745b7ef683d300362c01ee5875a8d7ae08e6f98
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or appear to be disposable hosting. The PDF structure itself is indicative of a link farm, designed to redirect users to potentially malicious content. The presence of multiple external URIs and link farms suggests an attempt to distribute phishing lures or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/0bc4ee3199abe395b52316943c4e08f9/bifudulujepu.pdf In PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/xiluw.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/78661444402.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/ae96331d9be8c098a640d925ae2d9c7b/75728242226.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/vokitidejirusobowejunez.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/mivopovovuvezapogolud.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1615c9df50e92a---90167325656.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/nurixokasumozo.pdfIn PDF document text
    • http://roberthalasz.eu/uploads/file/xamimodujikekofimepi.pdfIn PDF document text
    • http://kahasat.cz/data/file/noruvugobemipot.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/96744716945.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/mopapuxaxoburuwumevoxe.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/kigugowu.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/50411841135.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/97471625906.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/2808765607.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/degewazevutok.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/gutevojuji.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/gitikubej.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/38690911904.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/11535466417.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/99566237552.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/votabe.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/towaxufigukubapar.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/sajutuwubajudukebolafej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=observational+learning+theory+pdfPDF link annotation
    • 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://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_off0000be0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0B 11124 bytes
SHA-256: a89b02d960d4d5a21352b4810009edb80de6006c912e27f64259744305630eda
font_01_sfnt_off0000d790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD790 17476 bytes
SHA-256: e59d4af31e00d89cf9f2e51e8c9da832a1878795979a242247f5f391689ac3b3
font_02_sfnt_off0001048c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1