Malicious PDF — malware analysis report

Static analysis result for SHA-256 36049188a8446d9d…

MALICIOUS

PDF

96.1 KB Created: 2021-07-03 09:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0f470baa4b4d4c81cb64b28ef878d2b7 SHA-1: 49e421530a8001834158d515b4101a9936a61c91 SHA-256: 36049188a8446d9d9a39311e359098f1d0fc364461daecd556a6e0f0ec7e496f
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://coretry.ru/uplcv?utm_term=what+can+be+measured+in+cubic+inches PDF link annotation
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad26fd2f4d---fetemado.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/29fa6854261d62c386e4ad45418b4c44/29868969500.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af815b03df7---83456911683.pdfIn PDF document text
    • http://maihome.hu/admin1/file/58327484983.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/demiguvuvusoxorozi.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/6979761531.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia//files/mudalujubifu.pdfIn PDF document text
    • https://angkagenap.com/contents//files/filoger.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16078ddcb0277f---49348619663.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/tixelofegomarikokugolamuw.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a033d4a1c56---kunutajuvogumuw.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c05e0d50677---65503727743.pdfIn PDF document text
    • http://firegallery.ru/img/upload/puvabawilutopokamepe.pdfIn PDF document text
    • https://kildevangen.dk/files/mamona.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/vezujobejamigerowu.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16084eace7e045---762006868.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/84eaf0f31db11cb20973fc0b81dfd922/57133792004.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/ul593rc2tu6bnpisgltockghh9/gawigizogaliwuxu.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b024796fe26---rovesavavunilefajine.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/dfh291e1ceqv4vglpkvnls1gi5/kutekimokefudubel.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/gafeza.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/mefisepexob.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FD 10704 bytes
SHA-256: 0d6f225e940842d141afeb54550c1d86ce5faf399a06a0410eb0e541cf52506c
font_01_sfnt_off00011260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11260 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A72 18216 bytes
SHA-256: 8f0cf28da560d8e36a260be3d7af5bef059783f449070f2de8a6bb3a9423200f
font_03_sfnt_off00015aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AAC 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4

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