Malicious PDF — malware analysis report

Static analysis result for SHA-256 147fbd0094fc9832…

MALICIOUS

PDF

76.7 KB Created: 2021-09-08 06:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d81780f7461c49d73d4598efa501d19e SHA-1: 92c50115418578539935739997b990ca64440b58 SHA-256: 147fbd0094fc98323227f08ad6dad2940838d02eec3805ec8ffb78c97443e1ec
196 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely attempts to trick the user into installing malicious software by posing as a necessary browser update or extension. Numerous external URLs were extracted, many pointing to compromised WordPress sites, suggesting a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://drafthe.ru/uplcv?utm_term=pdf+to+ppt+conversion PDF link annotation
    • https://naucharts.com/ckfinder/userfiles/files/15086421127.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/onuod7ng56mj8i8mor3g0tg7ne/vepowawuwagi.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/3a12ad8c37428a11984773f2f222d9b0/gabamezasovopameju.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bccc42303d9---wogowimezowatat.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/58108680792.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/58395239243.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d6d2d6672---32154209275.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/merebafiripebanojefiruw.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/31754476713.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/mexerezebivoxakireke.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/66460668040.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/wapiliwel.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/bd8831554cdfcd026513d51f1db38457/75001396098.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/27384247153.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/643281824.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/zikutubopolexu.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/90617844476.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/47817167697.pdfIn PDF document text
    • http://gfzgt.ch/upload/file/bizovivofusowikivavova.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_off0000cafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFE 10472 bytes
SHA-256: a74ec824e71ea0f16e8c4582517c5c19609192ec071ea1bb1d2930aed5ef19d3
font_01_sfnt_off0000e2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB01 16680 bytes
SHA-256: 2ae26ef783c59a19a22775fd03b181a3688dfb4e71612233629643c1aa22cf91

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