Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3c80b3d23d4978…

MALICIOUS

PDF

80.3 KB Created: 2021-08-22 14:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9e979c911edaaef78e44c5320c0c6f60 SHA-1: 9632f2c33f192dc13f8d6844cfa9c4a5e7a14003 SHA-256: ed3c80b3d23d4978109338f13861a2f29ed51cd64228962b3e807f090d6bfb94
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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://pathtojanna.com/userfiles/files/dubixezirajedarozaketupum.pdf In PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c133a975a1f---77759017182.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/jaxanovapijavepamatulovep.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/urcgigda8ruop0qcrj09fsi3d2/nusuvuwubifefegejap.pdfIn PDF document text
    • http://katachizu.com/img/news/files/40633574038.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607588a4e2246---10404968776.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/61601026528.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/99673418593.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/joxifogogonuvow.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/zitakovinawu.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecba67ac3c---tifiwakoja.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/8943025405.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/52664826879.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/zepenirigokasogigifezuxa.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609091141e57d---gagajasebebupaj.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/71493475593.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5070167862.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6291b975---wexiguriwa.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/43312033648.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093aa8063d9e---jabimazoxetobukarobag.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/fifopitoj.pdfIn PDF document text
    • https://bataretak.com/img/files/file/ririxudeviwilus.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/04hdhrjct0mv16ptptgrj474r1/771378733.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160cce131c2a91---fibefukitixideb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=damar+arabesk+%C5%9Fark%C4%B1lar+dinle+mp3PDF 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_off0000d306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD306 18224 bytes
SHA-256: 7af6a8c9ad022768cbbe3423d7a7d086bf233d476b24436d5c71512c47c716f0
font_01_sfnt_off0000fff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 11028 bytes
SHA-256: 8f952b2a06450f81199f3d6378d7010b31494e29ad9a0cfd5b9b1e6cd69d3c0e
font_02_sfnt_off000118c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1