Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0dac1639e168ccc…

MALICIOUS

PDF

94.0 KB Created: 2021-06-27 14:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c1922ae45012d75c0e1eb1c7121f0e29 SHA-1: 41c305a4f9e80c8c743bbd2f6080224484862270 SHA-256: e0dac1639e168ccc40c61e7d15204badce829008bada538d6b618cb5853f7406
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS upload directories, suggesting it's part of a phishing or malware distribution scheme. The PDF structure itself is identified as a link farm, designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://chcial.ru/uplcv?utm_term=my+baby+keeps+blinking+his+eyes PDF link annotation
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/666bba34f703971a81a5f376881257e8/15519680614.pdfIn PDF document text
    • http://rayanchem.com/d/files/zuxorowagedapisipi.pdfIn PDF document text
    • https://mollis.rs//files/divulejivadokifezup.pdfIn PDF document text
    • http://artside.org/data/temp/file/wawotufipififuzo.pdfIn PDF document text
    • https://schmitz.cz/res/file/11198774392.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/bc440833394a63eec89bde9a2eadae72/gelamozefedixepilu.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8d6ce6447---80933855978.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3e3fd2196---24183248134.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03dac73c93---66570950613.pdfIn PDF document text
    • http://springbook.no/files/fefiletolubusunumakal.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/37169485769.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/29565597478.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/fegufe.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c952bae7079---duresejilij.pdfIn PDF document text
    • http://cuatudongsaigon.vn/uploads/files/mipowuziguzisad.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/zasefotapoxalibebid.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/34000059282.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/62db38908d83cbc85404e414659e1a58/gudagadig.pdfIn PDF document text
    • https://magatek.com/documents/file/fazamikijarekilap.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/f7977db242f3d34abf51a3aec49881f8/kipul.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd7e18ab39---xebifuvir.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/av7a3b9d0vfrkan56pf651arf3/19498192900.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/69rmu78kdg3hjb4ir44jkf4kf2/90195911986.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609acd56f345d---43693175004.pdfIn PDF document text
    • https://retta-bg.com/userfiles/474852231.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_off00010bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD5 10552 bytes
SHA-256: 8d7db0768affcb265cdecb98709d97d4951fbff96c4e1d9e8ab198a2f1c8d5da
font_01_sfnt_off00012392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12392 17332 bytes
SHA-256: afc5981993aff0a77ea2c6449da76fa287abbab664f5acc3aa775e9575436312
font_02_sfnt_off000150fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1