Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6114f69b019ed7…

MALICIOUS

PDF

110.0 KB Created: 2021-06-30 11:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 350e47e335be8fab40f982d6e795b5fa SHA-1: 8ec97ab6161a2cc04d3c376fb554cf624dc6a9b7 SHA-256: cb6114f69b019ed710c5559c5bc92b454abb14d2d0ea9c5808f825167245a177
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://archism.ru/uplcv?utm_term=ospf+dynamic+routing+protocol PDF link annotation
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/7d7stjchcm5unnajjc6ltevcj3/40452177982.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/9b365e6602969ec2ed2648e7457fb6ef/sanokuguk.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160856e8c7ca85---bewofobekerujis.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160dbbb7547b37---jixuwamowadolopasupaterel.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/60219627104.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/usi6jo1j6iaec5j1fuocgenfq2/ligutotaronozabo.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/7b7u2ucgh8ngsng0jcs7u1ass4/ruzosipap.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/3929018932.pdfIn PDF document text
    • https://gerastar.com/userfiles/file/bekazosukafavatav.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/11762139473.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/653cdd686ff2142decb959cf7768d8bf/83987133506.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a53b9d594dbf812dafd6237d31f17f36/99873089696.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/87768810962.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a94bc1bfc9---50034042653.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/94861396485.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/16278192488.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925b32d8aac---tarukijekeliwatafakej.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/lefor.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cd39e6dd8fd---95765593274.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/23790228046.pdfIn PDF document text
    • https://faprosid.com/file/48685503111.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160abeff9d5411---79280020190.pdfIn PDF document text
    • http://coumert.com/images/file/90203572109.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BAD 17472 bytes
SHA-256: 9477b91106460548e643157cbbd18e8e5dc6264a1e35c01882a1924e07c440a1
font_01_sfnt_off000178ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19106 11068 bytes
SHA-256: 669de6a2b0ab3f957b94ba6d2e4c047f6c882792f08cb5b417d0296cdf09ef6f

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