Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1346b5acf93d49d…

MALICIOUS

PDF

88.0 KB Created: 2021-08-12 06:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d21eb34ea44f8d2da0534d0b01d656dd SHA-1: e0b9279f85bdda30c7e24b9717ecaaab6ee1ccf6 SHA-256: b1346b5acf93d49db9d28ac76398bb6a242611c190ea3bb086de2b3fc52de7ec
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains multiple heuristics indicating it is a lure for payment redirection or phishing. It includes numerous links to potentially compromised CMS upload directories and disposable hosting, suggesting an attempt to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://psychologgia.pl/Upload/file/gukejokezopavotovifatako.pdf In PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/40823985866.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f50af396126---pimavimavor.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809605c4ade---pavit.pdfIn PDF document text
    • http://wjcopy.com/upload/files/25024789441.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/5c59f202b42a4272c0a6ddeaaa2a110a/dodazufuzenisape.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071f40f81ff8---xiporuzi.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/ea72338fff71ac5dfd345773deecc22e/40643227268.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/vefajitag.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/35891788914.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/57547471902.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160990a405156c---sajejik.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/85223278713.pdfIn PDF document text
    • http://flomojapan.com/upload/files/wezisoburimopanenamin.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf31d9e9de---55562028091.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/2a7b0606579070bda4e8174039fa872f/vafalawemugi.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/pjf93pmku1se5jtrmbm8s64fk1/mudewafuj.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/uv7av5far091olgtf6mqrn0oh2/matizekuw.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/xebawoxitiv.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/8014660722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+do+chase+wire+transferPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF355 10604 bytes
SHA-256: 920fde52206d6a754c8dec025a759acfc9a84f1a4cc067f5e094ceed98fa9fea
font_01_sfnt_off00010b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8E 17492 bytes
SHA-256: 6a6bc9d65784ccf594f38c41d1fbb4a27dcb86c475cf462df5fade9ce2ac8f6e
font_02_sfnt_off00013976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13976 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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