Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d6f98c3f8f7aa6…

MALICIOUS

PDF

85.2 KB Created: 2021-09-09 05:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 152c99a29312514db676e0edca76130a SHA-1: 9ff14c811b704fb48e3dc900e620b09a431fda1b SHA-256: f1d6f98c3f8f7aa6eced638eecdfd8765f9eacd3c8408be02db0d6d2679d8cb2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs pointing to compromised websites, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of embedded JS and link farms suggests an attack pattern involving user redirection and potential exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/f421el55mgfcllstrioplae1jn/56209212656.pdf In PDF document text
    • https://activepymes.com/pub/file/xagasofito.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/99734939626.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/40669759976.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/862a65e425b421aefe00da8c2c5722d4/tisalonutizenewilitet.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/kavid.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/vuxapetomabi.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613958b2d4b6e---nakonukigemunimibume.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/goxepinavonowidu.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/86758009612.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/kefifigajesabogelevip.pdfIn PDF document text
    • http://ekstelekom.com/userfiles/file/36595341969.pdfIn PDF document text
    • http://badgerhillfarm.uk/bexipegisabujoxuru.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__613556B275745.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/93530000921.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/25511761278.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/lobix.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/a635a356a9514e6f024c627ccb343573/59829973212.pdfIn PDF document text
    • http://katela.net/userData/board/file/90433884637.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/59770181387.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/zekoxubosozudobepow.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/tobejezukeposudeb.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/xosunibisujejes.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/79219163266.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=le+notti+del+terrore+full+movie+onlinePDF link annotation
    • 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_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 19596 bytes
SHA-256: f1eab17ec6e277d07abef2a99664409a36a71e1dfd91977df3724594bc5844a8
font_02_sfnt_off00012fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC8 10308 bytes
SHA-256: 742a6b321e7225a942e1f859e6e3b26ff15fd216a5af3561b2c9755786861f42