Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ed3b0cd3de20b2…

MALICIOUS

PDF

74.6 KB Created: 2021-09-24 01:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 603a038366dae94773972d3a5c519ed7 SHA-1: 787e8dd8482b05071d4481004f1e985f31e72496 SHA-256: e0ed3b0cd3de20b23653bf4ccac34df07c452498e2210bcb0ee9e519348e97c3
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple PDF link farm heuristics further supports the conclusion that this document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://mannoorpally.com/uploads/file/durubuzamixiderojuzalafu.pdf In PDF document text
    • http://umrllc.com/userfiles/files/16667499045.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/jotixir.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/6998017846.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/98127348722.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/ferevebasevironom.pdfIn PDF document text
    • http://df-2.de/images/daten/file/48673765190.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/59668241543.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/7a92da10fcd7c08ab88aaffdf7c73649/99750996572.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/zapuwijavajipulez.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/zuwutotaludu.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/zilidoxuruxokaruzipa.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131996f44da7---runonez.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/67226174600.pdfIn PDF document text
    • https://dm288.com/slicice/file/mevurenojibus.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/weterile.pdfIn PDF document text
    • http://ahknchem.com/upload/files/sabeziputemilexa.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/ekfjep5csad5pnuc6q80gcpure/38932267417.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/81100841764.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/fazefumoseduzekilesoma.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/25361816150.pdfIn PDF document text
    • http://xn--xhq021fvrwdth.com/d/files/fafusamew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=the+world+of+cyberpunk+2077+pdfPDF 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_off0000be53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE53 10984 bytes
SHA-256: c9cc89ad0fcb7307e9258313082d84a2fce04c75b8f4aa36c96928bac24c3c3d
font_01_sfnt_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 17444 bytes
SHA-256: 152e3915d39283839385e1a57344c9a7d7c86cc43c043af06c757609709d96a7
font_02_sfnt_off00010498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10498 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1