Malicious PDF — malware analysis report

Static analysis result for SHA-256 321faaed810d3305…

MALICIOUS

PDF

87.7 KB Created: 2021-09-09 15:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b2999126a04cd0544ae12cde246b0bb2 SHA-1: b1ec40530e9838b12f7d63c5b34a6a74b74d1963 SHA-256: 321faaed810d33057dec552fc01c38efa65caefdcebe7eac24be7eb57baa4a4d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, including one pointing to a raw IP address, indicating a likely phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with malware delivery or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://drafthe.ru/uplcv?utm_term=tintin+and+the+blue+oranges+pdf PDF link annotation
    • http://khiensa.com/UserFiles/File/5021907884.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/28013107456.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/labawarav.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/wugukijixepagapifideniw.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/mekixewegawusoteg.pdfIn PDF document text
    • https://foodthings.us/userfiles/file/66295831071.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/89868686070.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f282f87870---manifaberejiximifu.pdfIn PDF document text
    • https://somogyplusz.hu/files/jadusewoze.pdfIn PDF document text
    • http://recviem.ru/img/upload/gogimutebisegomukumi.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/divezulemezaforazip.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/97d94ddd80fbbfacc2399da3177152ad/vituju.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/kusojafipiwexi.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/66486340286.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/74436632766.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/39244537782.pdfIn PDF document text
    • https://mattress-leader.com/media/nidesuf.pdfIn PDF document text
    • http://tichdiem.surecare.vn/uploads/userfiles/file/welufazaxanul.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/dunalawupufiwugawemagelu.pdfPDF link annotation
    • http://rc-mst.com/mst/_upload/files/50774349783.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/gesetedi.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/juxukixokoguminalemami.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/xiwikatujoriruvawugowug.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_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 10980 bytes
SHA-256: 713dfd548321bcbb9c88f1d17805df8195ff009a7fd29506e28b98f3854d11bc
font_01_sfnt_off00010a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A38 17920 bytes
SHA-256: 52b4139f91737766f1965ce3efdc151fa7bd0ef6e73abf07de8bf4914dd4b0fa
font_02_sfnt_off00013927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13927 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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