Malicious PDF — malware analysis report

Static analysis result for SHA-256 7198e69605fb60b7…

MALICIOUS

PDF

68.6 KB Created: 2021-09-30 13:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: aca583f69fc1062fa8de0cfc29b73d83 SHA-1: 5300417086c2399f6e15f302f245cfdfb5af3362 SHA-256: 7198e69605fb60b7a8c79d6b3a6bc441698370ae63cedea63e25747a0613b80a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further supports its use in distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://allytemp.ru/uplcv?utm_term=old+minecraft+unblocked PDF link annotation
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/2fe10effe639a3505aa30f9fb528429b/vizazujusakadosoxitodon.pdfIn PDF document text
    • http://veitali.com/upload/files/32107606901.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/32868453321.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/69569134689.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/85937876340.pdfIn PDF document text
    • https://mklaassen.nl/images/file/lefofimagogare.pdfIn PDF document text
    • https://zahidnawaz.com/UploadedImages/image/77258493743.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/19595530899.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/88364078127.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613e75824056d---79106999407.pdfIn PDF document text
    • http://beta-rc.com/upload/files/zanesiduwixisigor.pdfIn PDF document text
    • http://trip-sale.ru/userfiles/file/51613335047.pdfIn PDF document text
    • http://rhondachem.com/d/files/pejadagesibaju.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/58245099792.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/gopasazesutoselabek.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/xozaximeliriru.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614ff20fbeed6---54334110296.pdfIn PDF document text
    • http://sportgalaktik.sk/userfiles/file/88720054827.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/70ba859fa0c7861caa1616ddffe599c8/lajaze.pdfIn PDF document text
    • http://vevo.keresztessyoptika.hu/elemek/file/dubufapupuje.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/tirobozozenudeximi.pdfIn PDF document text
    • https://tedesco.pl/userfiles/file/14099551873.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/c8a1c7a8b4a464c20498a7e5c0b8159a/26905565215.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_off0000ad73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD73 15276 bytes
SHA-256: 1c169788bd9fe882e110f425f0a20470723c3ccde68d9553fa7729d0aa3c27be
font_01_sfnt_off0000d402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD402 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC19 10828 bytes
SHA-256: 7852cd94679a667a04fd2dd6b1dd6a1db66b9d06eaad9d65b3321d1d6c8dfb60