Malicious PDF — malware analysis report

Static analysis result for SHA-256 208f885b8c6c31dd…

MALICIOUS

PDF

82.7 KB Created: 2021-09-06 05:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ee0ef0e45b75f7662043549a11c85e80 SHA-1: 66502ef298a1d30a2ec55a74cc2381ac3b79086c SHA-256: 208f885b8c6c31dd1f204d79315fdf1fdc21b834239abd02f74c0c7579bdebc7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, indicating an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://crysiq.ru/uplcv?utm_term=judith+weston+directing+actors+pdf PDF link annotation
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbd8365a25---tovetoxedakawukirogija.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/j1j6lhtjdomvto8suvo3mfmcv4/89537743878.pdfIn PDF document text
    • http://digifast.cz/userfiles/78261326820.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a015de07e---zalajojowixudud.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/6a7eb3f012b62c84d1c6fd37bf3237ff/29733286913.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/crr8epjeg07lbej14913g600ul/13048346955.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e64a91d3b41---bonipal.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/fosevelixijevupuzalez.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/57632657855.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608219cb2449c---gegadamifasewud.pdfIn PDF document text
    • http://ulsantour.com/FileData/ckfinder/files/20210817_4F1AFF806C8A1D48.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/04cc5c4127f5e0a4df0fea3cb4bed8fe/85641595946.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075c3aee8789---6122886720.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/mipubevujarofozelu.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939f2892f1f---60321959938.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/25288986418.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/kodin.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/27374269347.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63908dead2---wojubojexuvukabilumore.pdfIn PDF document text
    • http://mp-journal.com/media/file/11292486837.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/11f3aa0768e05d21fa2a98315ae5b246/diboto.pdfIn PDF document text
    • http://derma-dts.de/files/file/wesaf.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA50 11028 bytes
SHA-256: 997d2c54e719bdbbf815bb74db9aa1edef9ec81ab0d4ccdbc945615fe1d87279
font_01_sfnt_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 19236 bytes
SHA-256: b3960b249eaa6995a6adfe5e690aaf6c23493b39986d687d3294ca8ccc485e90
font_02_sfnt_off00012595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12595 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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