Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd810f0e1dfc10c…

MALICIOUS

PDF

89.0 KB Created: 2021-09-16 23:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 55017645407ffc91502640f33cad2d85 SHA-1: dc89f6c49426c329a9773cf407915587b37ce271 SHA-256: 2dd810f0e1dfc10ce358f58e9119a8b1c5d6d062903881e761d1c8cc08acdc83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or phishing lure. ClamAV and ML classifiers strongly suggest malicious intent, specifically related to phishing. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://brmhn.com/userfiles/file/20210914053332_18bnt0.pdf In PDF document text
    • http://alibabashipping.com/userfiles/file/63318387323.pdfIn PDF document text
    • http://instalace-charvat.cz/userfiles/file/kofus.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/jixepafazapov.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/ronireverawafawoj.pdfIn PDF document text
    • https://rockeit.com/userfiles/file/zotelig.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/kizokitonudobujojexokogok.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/b002661c556d5512208db6f9d12199b3/dizedolalegevuroduma.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/balomo.pdfIn PDF document text
    • http://inistor.com/ufiles/files/futefo.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4121198d7---puperopatojoxifekemaw.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/96452068989.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///40947645910.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613c30ae8c3e2---xalesofilonevibukudo.pdfIn PDF document text
    • https://terracell.pt/images/file/ropuzuwovamawubep.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/jinifafukurad.pdfIn PDF document text
    • http://hasyo.net/files/file/zapesokagobesasesotomo.pdfIn PDF document text
    • https://foundlight.ca/home/foun6192/public_html/files/custom_files/file/nafovatipibixunab.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/ginadolasitewiw.pdfIn PDF document text
    • http://alcantara.cz/data/file/rixijujegofuxokotepar.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/057f3cb6cfc2ca92a8e7523c47567c0b/dademudugut.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613754215f9b9---gujebogukunogur.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/91496604744.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/lojamaxeko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=4k+hd+video+download+apkPDF 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_off0000f977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF977 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001118e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118E 10348 bytes
SHA-256: bb97f802ad600efb6b28c0113aba0875ea135dcf334400ca73a71e815884538c
font_02_sfnt_off000128d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D9 17760 bytes
SHA-256: 4fd7d626c9c5cc9d1bc167906adddcba830e7ca0d2c8bff291e05fed3c083fed

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