Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd130efc2ab0ccad…

MALICIOUS

PDF

78.9 KB Created: 2021-09-02 17:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 29e8c286112a719e783d3f0b140c1005 SHA-1: aefda5eace3423e224aadf2b8975d4c249973cda SHA-256: bd130efc2ab0ccad32905281531ddd80a5852cf64f5b5dcddde34f2dc0869e13
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of these numerous links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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://infrive.ru/uplcv?utm_term=olympus+pen+mini+e-pm1+instruction+manual PDF link annotation
    • http://hc6999.com/userfiles/files/medugavoraju.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/48597390488.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/ranik.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/11860954704.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d31dab6fa---lifiji.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abaa7518572---9959750288.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/933f8e364929df5f4abcd31542bc6138/vinerukiwez.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/rivanuzexuxad.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/latuzofijasawejaxaxok.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/geberagufop.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/du465r8ppok2edt85frda299r6/15899058090.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/sazebemu.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/voie4nsc9cvu9g6aies5fabtar/selewijubemejexisisolu.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076aeddcf267---komisatalubuga.pdfIn PDF document text
    • https://advertisementnepal.com/ckfinder/userfiles/files/joniliju.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/96040385062.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/rifuz.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/96380120505.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/jigepixus.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160be7fc370977---77800157124.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/396377305.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/010857453813.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9c8d385ba---rorotov.pdfIn PDF document text
    • https://faceless.me/userfiles/files/mezisolumatamosusum.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/16364950196.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210522113611.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_off0000ceea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 17484 bytes
SHA-256: f291605c6f8bb8c9e1d5674a34911effba6479a244570cf70f0c5556980db8eb
font_02_sfnt_off00011453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11453 10860 bytes
SHA-256: 4748a4e81fa5c6458324500ae1730237929770be5b15f0d929325b3664dbf275

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