Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe292706a36c2525…

MALICIOUS

PDF

93.6 KB Created: 2021-09-08 19:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dcc1aecb114de4ee56d290c67cb16b4d SHA-1: f6677a51fcf7ee6a03c4602ce70585b6cdb99673 SHA-256: fe292706a36c2525e395a691e0d015d9704529a7e2b96244f1e8b3ecc2455342
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the numerous extracted URLs suggest the document functions as a link farm, likely to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and heuristics point towards an exploit or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://minipit.com/data/files/vuremamumujagirefezexana.pdf In PDF document text
    • http://leeclinic.kr/userData/board/file/10946677970.pdfIn PDF document text
    • http://santehnika34.ru/images/file/supisezuvakigufixuvage.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/wugabelidojiloniguburezip.pdfIn PDF document text
    • https://anaksemut.com/contents/files/71442468236.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/3974945254.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/51465392008.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/58404508259.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/xenumowopizetozijajososa.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/sewebakozufuvazeke.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/64706561751.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/37277883505.pdfIn PDF document text
    • https://martas.vodrsport.cz/uploads/files/20977223650.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/fiteji.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/67021464792.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/zinazedotovibaw.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/77176256357.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/31922998857.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/35664344127.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/vunawuganisevijoxibetej.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130445269502---zaledoka.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/fopixazomewe.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/26289551204.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/32554037632.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/76202859289.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=grade+12+chemistry+solutions+manualPDF 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_off00010765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10765 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7C 11060 bytes
SHA-256: 8159e45846af32a1765d6b9240e2da06b356038798d58acef9636c647bac6f29
font_02_sfnt_off00013937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13937 18672 bytes
SHA-256: 1f52aa7168a9205255f7bc58686526aed6759bb5d03b1e2d147b44d1bb604fc0