Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3576834673643af…

MALICIOUS

PDF

84.0 KB Created: 2021-08-26 14:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2b4fb9d1affe49ff341aa817b0659f70 SHA-1: cf79185729f10cd244a01d38434eb839ca145d43 SHA-256: d3576834673643afd42512a03f7644a7b558c69ce6b2ebaa45fa887c1659a92b
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF was flagged by ML classifiers and heuristics as malicious, specifically for its use as an MFA lure and a payment redirection lure. The document likely attempts to trick users into revealing one-time codes or bank details. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to phishing sites for credential or financial information theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://adamslakeband.org/userfiles/file/46064949264.pdf In PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/121dce107ebff400d90bda81baab5e3d/71142242068.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c322e665fae---30109036325.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/61679795154.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109f51bb8acb---27395317564.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb24d464a6---1922651625.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/726865dea4337ec165ec3e83eb6cd0d7/56599448933.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/55670243832.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/noreluzidapopasalokopedot.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e805f351a1b---5024564756.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/cbf7lauckvhgobbs4bb5eq24c0/53798078609.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/860bcf90131587a4776a41d18ccd9801/vowugalifizaj.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3304fafc78---56265636197.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/ba3b2fb2f7aa0b937f7b35943acb5760/80161815065.pdfIn PDF document text
    • http://sixtyguildersresearch.com/admin/photos/file/90761470137.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/99845499575.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/gpjo4qctge1jdgfrh3b69go4fo/124270138.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/388d5192b2d3fe4aeb048de45da4bc27/61655394454.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/takumonol.pdfIn PDF document text
    • https://kede.org/userfiles/file/bexeninopanasipaw.pdfIn PDF document text
    • http://kotolantopeni.cz/file/55075409909.pdfIn PDF document text
    • https://jurad.eu/files/file/tagujapasujivada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+gift+skins+in+fortnite+without+2faPDF 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_off0000e432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE432 16976 bytes
SHA-256: 34c88832961a9afdcc68325986aef3b62c25a7fe033cf08aec48cc2651a242c5
font_01_sfnt_off00011020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11020 10836 bytes
SHA-256: fc1c359ca3b2ae830a3b1e5ee003db3698c38adfaf54792a931aee6bc2717b3f
font_02_sfnt_off00012937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12937 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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