Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06f250ea7969a57…

MALICIOUS

PDF

74.4 KB Created: 2021-09-28 19:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5a3e73234725a8e4d0f7b3d00ba25124 SHA-1: a795fa921e33476a763ebb9aadfc4532a0a3fe4b SHA-256: f06f250ea7969a5726c6c47449fda5802f09e5b61018e9f690c18bee8d4155f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external links, many pointing to disposable hosting or compromised CMS uploads, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF_URI heuristic indicate an attempt to redirect the user to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=color+os+7.2 PDF link annotation
    • http://mazraeir.com/images/upload/files/sodavumoretijunifusiri.pdfIn PDF document text
    • https://remont-bez-zabot.ru/files/file/49913723157.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/45288984591.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/jipanozosa.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/peredozipidilutadegiwoza.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161414e8265267---62719794124.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/dagixisinemalumax.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/94603928516.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/radapulajejebekovu.pdfIn PDF document text
    • https://roshnaai.com/ckfinder/userfiles/files/wagarozexutesozamajiwu.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/xizolamof.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/polomatizesunu.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/98495120602.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16137b522e5f48---61025157989.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/0ff46d54e1e31012e7f8721f6f7a482c/3359062408.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/73665281333.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/39483997692.pdfIn PDF document text
    • https://jfava.gemwareserp.com/userfiles/file/resarifelabinubibip.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/litegiso.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/vidulovitebegajuzeg.pdfIn PDF document text
    • https://edgecs.com/documents/kajemudizabozuzubegarani.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/46826279370.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/60538133598.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/40347936983.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/pawukewegededuxejojodilo.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/161332109ccd06---29989788081.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_off0000bd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD529 9780 bytes
SHA-256: 192a5be9cf0fe840d786e19486675d7733fa752c8799fe694bbe39ae99bb4b0a
font_02_sfnt_off0000eac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC8 19032 bytes
SHA-256: 1cab46d5bd03e6e9b69f0047116d80fc04be6229e786ef6c4fdc9b120fa5c41c

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