Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1174dc201ea1dca…

MALICIOUS

PDF

179.6 KB Created: 2021-06-27 15:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ef9ad35c96ea2e56283c5f35a3ea6fd SHA-1: e9eac3d8744442cace29a9ff5c60346a1c81064a SHA-256: e1174dc201ea1dcac49ab24a0e377c9a94b051137227dc604d35caca6bf86739
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 as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. The primary purpose appears to be redirecting users to external content, which could be phishing pages, malware downloaders, or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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 http://alnadaoil.com/userfiles/file/94135712123.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708c99d364e---18398315747.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/eu5veps30jt22hrssao2an5bmd/zalogowivururuto.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/4917f7b478e0922b295dbe9fa9628114/70718582150.pdf
    • http://greenbrier101.com/userimages/6956209583.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c6bd6cffe---mubuwatavowajama.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609957424a9ec---tomisefevolonulanu.pdf
    • http://ekolojikweb.net/upld/userfiles/file/sufuzerezetemefusalun.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/4gjamcen6ooi77ltnnnc1dne26/tuliburisekasigumukuwu.pdf
    • http://cuacuongiare.vn/upload/files/16783472106.pdf
    • http://kagoshimakojintaxi.com/userfiles/file/77556187088.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/f10a6f17f77baaa22f62a3f7da94e05d/95622406686.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160addceaa220b---16736337356.pdf
    • http://cesmclassof68cheyennewy.com/clients/82478/File/68735109192.pdf
    • http://botosani.ro/img/uploads/file/lidukezonadupakid.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/k8vu8g4j3qs8ti6o5t0jhbj7r6/65368982644.pdf
    • http://harchovyk.com/userfiles/file/febeteniniwizejivumo.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/5a8ca6da1a2043fdb71ab3bbeac48cc1/11705680765.pdf
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49280793445.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/e96067a5fb76690dde25dc44cab496f9/78329783201.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5095da5dbd---73926958750.pdf
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/77d24414d7a501f42eabb1d875605f39/23077538305.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=emerson+poems+about+nature
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026271.bin
1f5420fe6f0f9299f4c5534efec7711d26f9ef77b5c6c37e6c278fecabd24e6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x26271 18092 bytes
font_01_sfnt_off00029151.bin
bea5a25ee62e7e6847c04f64dc1d26c767433b40272d53a056097181df050e76
pdf-font-stream PDF embedded font (sfnt) at offset 0x29151 10500 bytes
font_02_sfnt_off0002a8f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A8F5 16792 bytes