Malicious PDF — malware analysis report

Static analysis result for SHA-256 073f68336b3a1c6a…

MALICIOUS

PDF

78.9 KB Created: 2021-09-06 07:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0a0e83210a1712d48ccb1124fa742b4c SHA-1: fbfb099c84008c2a816d662b469240532755d502 SHA-256: 073f68336b3a1c6a8732fb402363ee7fe77afe3dffd765b99c0cab16c8d039e8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which appear to be compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the presence of numerous external links indicates the primary attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://krisoc.ru/uplcv?utm_term=penyebab+hematochezia+pdf PDF link annotation
    • http://fredericjean.net/oplusco/file/pulipuwekajozaxosimemoma.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/71441891642.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/repuj.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/kimapawenijezeb.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77684460636.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/18752393206.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/67812627239.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870aab8fef0---88466646187.pdfIn PDF document text
    • http://asfalon.com/__files/file/vinorajugelewe.pdfIn PDF document text
    • https://shopabrang.com/images/files/jogisituv.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/d16c2677fe5ea294d26fca2c15cf0f0f/tolubomejemurineluz.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610fa75868784---42188290375.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/84353840119.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/dimasujoxulosudeze.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/xilesokirowipupidelugema.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_off0000d02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02C 17400 bytes
SHA-256: 5b065d3074e5b4b672d9d82c7364b5670b6eaeeb70bd80080520aa8a99ac08b4
font_01_sfnt_off0000fd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD83 10888 bytes
SHA-256: 99197344d2128933a46416161df065a6f21bc0df8c9d40bfa64aa7c9aad6cacc
font_02_sfnt_off0001165d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.