Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7e7319e24adc28…

MALICIOUS

PDF

84.2 KB Created: 2021-07-15 18:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f5a25d7de1e5533ba7f6fe4663ef473e SHA-1: e9015aabe04b6616b2e62c1bbf1e58889059dcfc SHA-256: 7b7e7319e24adc285f3868adc66f3f1db0db54a743d21685363441d11a45eeb4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The document body, though heavily obfuscated, combined with heuristics indicating a 'Payment redirection / bank-detail change lure', strongly suggests an attempt to trick users into updating financial information. The presence of numerous embedded URLs pointing to various domains, some of which are associated with compromised CMS upload storage, further supports this phishing vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://zamokugrofa.sk/admin/fckeditor/file/zifosopofi.pdf In PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/52339811143.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/vabegisoxedazixekito.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/32700060784.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/13277454027.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/97277079225.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/lepusomukarigoza.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3e8443ca8---sezijog.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/2be60174e5414a339eb1b1dae2233258/19300082017.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/ziruzerulafumokiwal.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/jowemukexewoz.pdfIn PDF document text
    • https://autoparkalbanese.it/file/tivaxomefutarodet.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/89eaa4b94382c5100a83ecdfe63578d8/67586845662.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21f883f12a---zevilosezedepani.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/o1fcgtjf3j4eevaq3bjnl9bupm/nudutofilujuraxaxivuju.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/pefuruko.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8feefb86ce---kiwiwatuf.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/95360995748.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f0686bbeb---26443708188.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/51070136330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=rto+number+checkPDF 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://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_off0000e903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 10404 bytes
SHA-256: 7e763c79f46dcc796314312176cd8e0bdc60e6fae4d7b439d17f2d2c44efd4c7
font_02_sfnt_off0001187a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187A 16812 bytes
SHA-256: 4e83895e277cb2d40ef1a8d85f575e3a1102cccdf10777b6d24535f29725b32b

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