Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2992c4ba8981e0f…

MALICIOUS

PDF

77.0 KB Created: 2021-06-24 00:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 73a513ffcb5cae4e5b9b6f12d3cfa158 SHA-1: 70d2155658d3cbf70a0104ce318678afcff6960f SHA-256: e2992c4ba8981e0fd9b1c7c300ba525fc3324f401316eb6732d9b2aac04a6239
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://smidgel.ru/uplcv?utm_term=pdf+books+of+chemistry PDF link annotation
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/b5eeb4a4ef7a94f74950813d72e2b4e1/19241172476.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fabc9f13b---50986103964.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/lrmjum6i0n2hkd4184crgodod0/bepabubemumanavu.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/e71534a76c9a2fadb7817d3fb462e0e0/20991798706.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608240c9cbe29---lukufasexego.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/lafefos.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607978bcef5fa---bobomuvuze.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/30199253354.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/roser.pdfIn PDF document text
    • http://maxbrio.kr/files/files/16027549367.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8fd80beb8---34035356867.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/badumiwizenetomin.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/28022c131b9fb9b23f578cbf93c3ed6e/livure.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/ff83376f2238f27065d30f53ad661fba/tipazip.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16081173453b81---94882739651.pdfIn PDF document text
    • http://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/molesevatuwek.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a49ed08195d---9177757774.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b91472d9ae2---vazulabemawafixawure.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/1563430827.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn 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_off0000e11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 5008 bytes
SHA-256: eb92eff1538934e71bcd5e89a9ba9cb623204f51f9965cf2527867b0df5432dc
font_01_sfnt_off0000f22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22A 10892 bytes
SHA-256: bdc152a66835fb5334863810b4122814771a6e8567c0b9cc1681691d77eccc91
font_02_sfnt_off00011750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11750 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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