Malicious PDF — malware analysis report

Static analysis result for SHA-256 196093ef7647c6a5…

MALICIOUS

PDF

76.6 KB Created: 2021-09-02 08:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c4352222221d07db07cfecae4841cdf9 SHA-1: 8fc2aae2e5f5bd74235742645a9008519a045564 SHA-256: 196093ef7647c6a54635e92b21335819257a51bef029cd9502c86c7a876b5e94
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous URLs that point to compromised WordPress uploads and other disposable hosting, likely to lure users into downloading further malicious content or visiting phishing sites. The use of SEO-manipulated terms in URLs suggests an attempt to improve search engine visibility for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://synerhu.ru/uplcv?utm_term=shootout+at+wadala+full+movie+online+watch PDF link annotation
    • https://kaptenhoki.net/contents//files/firunevogikukopiwonu.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0815d15a4---bomazawinogakezixewosor.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608a884b9d2c6---zubaduwivikelivitita.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/82678363211.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/bekum.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/a5801ea5de118c582ed7ea0315cbf0fe/14237193522.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/b045dbd4d421d942d45bb1844c139a28/87886920284.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/2ed9927a97c94eee252b4de1907fa9b4/basexutuliriboxazad.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/vfo4sbpuln5e6im1kbhue193v0/winerepevoto.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/fonedapamasazugen.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/dilunisepeligozula.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079a8b34dab4---zisofakifakugofix.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/c2197bb6fa36efa63f86173720370402/93790235547.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/misaxaw.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/voxudutorofopegofoze.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/47333348769.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b298c2af61b810865e7a6b0c91c8dc7/48316428900.pdfIn PDF document text
    • http://parfumland.sk/upl/84848347800.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608254f12b478---87224185646.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/jifetuj.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bd3ce024b---punotabifitu.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-1/20210901020446750664.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c005ae1d660---reliwarimunakorevawagovux.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f43919ef018---23489802040.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_off0000c8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AC 10800 bytes
SHA-256: b20f6daa35c2a21965b9964516a494f6967455b0ca25458f886fb3ed22048e71
font_01_sfnt_off0000e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE174 16472 bytes
SHA-256: 5a5567ec5f8839c865ec11173db1443350ae62163d65904acb4e812491ed4cc0
font_02_sfnt_off00010b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1