Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44f0739c11efc25…

MALICIOUS

PDF

73.6 KB Created: 2021-09-27 10:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f2906b76706cb09081e29533e1f6123 SHA-1: 7bc9b33c6c54c89bd0b41fde92539cba4ac15915 SHA-256: a44f0739c11efc254c1a5ac3d456eaef2832f9c286ec1b60f89b44969c5ba4ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to various external websites. Several of these URLs are hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of external URI heuristics further supports the attack pattern of directing users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://pistant.ru/uplcv?utm_term=what+is+the+best+mobile+emulator+for+pc PDF link annotation
    • https://peltonfell.org.uk/ckfinder/userfiles/files/22024963150.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/guxaxotatag.pdfIn PDF document text
    • http://gamaxmotor.cz/data/dokumenty/92307629626.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/39722237315.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/2c57765dc2a021c46cd66cc6cd12ddc6/75773741581.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/xufomajat.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/72200007994.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/wijipikelu.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/75265930543.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/78684328119.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/wawarujedika.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/41379893492.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a656dd9efa662d8cc9af9aa8bdb2e133/tekuzulag.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134f0c9e350e---21154412488.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/22956280522.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/83114699663.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/52294568760.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/voduzedobojaxanemodog.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210918/0523034574.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16130678a56526---94737762729.pdfIn PDF document text
    • http://print-resource.co.uk/ckfinder/userfiles/files/kepolaretamakudako.pdfIn PDF document text
    • http://gattoneva.pl/pages/userfiles/file/ketugutafolilaka.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/vivorel.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/35000246521.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/54444711737.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/58186677071.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/sixikomu.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_off0000b9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B2 10876 bytes
SHA-256: 130de2fa6d2e81cd847a75ad8a0e298b1394a7783636295685a65e844168db84
font_01_sfnt_off0000d2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB3 17744 bytes
SHA-256: 085954ef07b41965b8a53ba21c34ae4c488770e7ec30679cb0ad87869c4fbc9f

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