Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4153d8edc99ccb…

MALICIOUS

PDF

80.0 KB Created: 2021-09-18 20:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1feffa725f2b0daba2930a52fc829d4b SHA-1: 1155c05b16bc5b2bcee5b1e9b338bd13d077fc72 SHA-256: 5c4153d8edc99ccb5c3539c0c4da88602b8dd602609d5e4d2009b2b5cccf2e6b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload storage or disposable hosting. The URLs are structured as a link farm, with one prominent URL suggesting a lure for downloading FIFA 21, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=fifa+21+download+ppsspp PDF link annotation
    • https://kalimati.in/userfiles/file/vidafor.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/50874763562.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/remojuxet.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/vaxofejukumon.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/jalubuzofir.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131b04465e59---16411664245.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/fasoxubuvupirefixijix.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff9dc3f8f4---13558280911.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/67754585091.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/meriwanulumab.pdfIn PDF document text
    • http://unityproductions.com/upload/files/posadaxadinosituluki.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/63966589717.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/sewokipuliboxuvuto.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161346b7db047c---woroxiwefapumot.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/20334183521.pdfIn PDF document text
    • http://a-pluset.com/userfiles/puteruzo.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/xuxebel.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/52052749213.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/14804803606.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300b05ecd1c---4445919043.pdfIn PDF document text
    • http://test-immo.com/file/zigazumemujix.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/tadelaxusiwokof.pdfIn PDF document text
    • http://petra-koparki.pl/Upload/file/wewaxopa.pdfIn PDF document text
    • http://vrzion.com/data/userfiles/files/71266526869.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/45989113993.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_off0000d4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 10396 bytes
SHA-256: 79be0c1d095e54d76b85c0c4decb632046ae405e3b97ce9efae75873979b2a19
font_02_sfnt_off000104c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C6 17452 bytes
SHA-256: bbfb13639d1e1b5a8c740a626aa7662031c2af436d96f4440101e3cc33932164

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