Malicious PDF — malware analysis report

Static analysis result for SHA-256 2954fdf471128651…

MALICIOUS

PDF

75.3 KB Created: 2021-09-14 12:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5273032f7277885093874e8aa37853f9 SHA-1: f1605d6c9767147ffa23bf26af9d6137b52f1b2e SHA-256: 2954fdf47112865156ae3ccae8d72b76a52e52b2b7f5a47de92b527795355346
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly supports maliciousness. The document's structure and link distribution suggest it's intended to lure users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://archism.ru/uplcv?utm_term=how+to+connect+pc+internet+to+android+mobile+via+usb+cable+without+rooting PDF link annotation
    • https://moulindelarroque.com/userfiles/file/96154546988.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/jowalupuxosegesakobunoroj.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/16668820590.pdfIn PDF document text
    • http://encino.kopanramen.com/uploads/files/50170763742.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/kafex.pdfIn PDF document text
    • https://foodthings.us/userfiles/file/45123646617.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75889743712.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/vusef.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/xakomusa.pdfIn PDF document text
    • http://lepal.sk/ckfinder/userfiles/files/dalogigoxuwawisuzoxi.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/vagupesajivaniwufimabil.pdfIn PDF document text
    • http://hkalc.com/userfiles/doreko.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/83510996353.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139923ea6946---56014317291.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210912_040609.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/zinitozofowisujelofabe.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddbd305c4e---ditevekibeviduwixuxuna.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/tilurixaposakudarulaxipi.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/nudexetubavele.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/34e21391c05d1b3f570c8fec8466e0b7/kafegubedi.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/jofipix.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613a879f9f369---dasotomivinozamiraji.pdfIn PDF document text
    • http://canissapiens.com/images/uploads/file/40148035792.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_off0000c33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33E 11344 bytes
SHA-256: f35eee9b368ce43f2f2e5c2a681d37958ccba051f6e0600efa30bc62a11c2dbe
font_01_sfnt_off0000dd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55F 16196 bytes
SHA-256: 5a52dd71c6146d452168186a85fee1922fa78d33058707bbd152760477988d81

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