Malicious PDF — malware analysis report

Static analysis result for SHA-256 9098b97e570b066a…

MALICIOUS

PDF

86.3 KB Created: 2021-06-29 04:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9ffc24f6adf44bc82d77d652a09b5c08 SHA-1: c29027c59af440a54646bd5add9e7fd9fd95c44b SHA-256: 9098b97e570b066a9f691b5946d5de71f396404b9c2fd01e50a6408d289f66a4
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage, suggesting it's designed to redirect users to potentially malicious content. The embedded URLs, while some are marked benign, are part of a larger pattern of hosting links on potentially compromised or disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dec65fde6---88851542509.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ad3e5840b---zojiwepa.pdf
    • http://stl-hk.net/userfiles/dulomizevasosatowa.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/99f890ecbde45995568aaf8fbd8389ce/84957401623.pdf
    • http://sewakendragroup.com/userfiles/file/xawepofovape.pdf
    • http://mgocsm.in/userfiles/file/nolesonalafosogolexagido.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/8decafb82994ea79251d9e0641ab0721/rejejagipasopira.pdf
    • http://aylincinarli.com/fckfiles/file/53312535051.pdf
    • http://ck-tct.ru/userfiles/file/2681265810.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/9401d11d0eaf70ee39758cd0562d6f28/folabitasufagubopiduxuve.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/hjnpgls4si5f3rgok0bgccrt66/zedejifumukedumij.pdf
    • https://bcbc3399.com/upload/files/giwinodiwulunejutorime.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/53839670495.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab89f4124e8---zakomiretuxomonawi.pdf
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/rilaki.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/a02cc0fed706c8ba7edc8cf5e071efcb/guvojeb.pdf
    • http://www.hgbehringer.de/img/files/files/wadenopodonufopetevo.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/9eglstdtdm6grobrbf54cgq0ob/gijaniwononegeji.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607d29dea211c---gemadirubaduzizi.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/nimuxevosolabijavowivekof.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b68f17e2ad---jature.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704e605c1d6---80919221550.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=canon+550d+manual+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec54.bin
00c6459dfc8af0949a03158cbe04fc7e967da41edc550e3bb72a0d8fd55db536
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 10292 bytes
font_01_sfnt_off0001038d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 16792 bytes
font_02_sfnt_off00011b9f.bin
89e15a5c451d2644f8dabaf0a0537c23e1914abf3455490c6fcc6d57782e5d62
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9F 18736 bytes