Malicious PDF — malware analysis report

Static analysis result for SHA-256 07462666066c0f4b…

MALICIOUS

PDF

98.4 KB Created: 2021-07-14 01:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4c4ef004d4bf2e7057ada573510ea734 SHA-1: 3a4a135ea6edab0cb333ca993634ca34d2d3b9f4 SHA-256: 07462666066c0f4b44124b08ff821c00b5f42de23a2c284724bf986f1bb3719d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites using common form plugins. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or exploit vulnerabilities. The document body is unreadable, but the heuristic firings and URL analysis are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://abril.pe/wp-content/plugins/super-forms/uploads/php/files/a4op8ajc3b456kd1vl0ste0u1p/javudepenepemovufulip.pdf In PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cfb614d13---91830771868.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d268b64cb---99574226995.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/ccfe9d4161356d2a8860346c8a32aeea/20072753264.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/56420737972.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/44900518179.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607050cf39d73---sowajem.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/38715874955.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/54d1c471ee5c7cf126c66918fdc932bc/27155908484.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/3047e54cb8b0c98c3d1f44b0f1cb0caa/79041506726.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/a354207e8ea36532a1745b9a6f868136/86454228417.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d2a77276f7---86762623591.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26ecc0e387---37842774441.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/90578497811.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/d2b8bada1a2fd51d476ed623008c52ac/53674433103.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ipinokefa.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/luzupusixe.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/jmp7mjl3ihn67qdoctemurgva5/68682192021.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/sokisasizoduwipiped.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/34489766882.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/vedibijotaxabadedi.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/53177889204.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe6de1ebda---38158102857.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=egg+rolling+video+gamePDF 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

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_off00011d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6C 18452 bytes
SHA-256: f8832ec7d4dd1f3a2b035b11effe802e799714d0a4bb08a31b24a5b14899370d
font_01_sfnt_off00014d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7B 10376 bytes
SHA-256: fae655957e0198192c4823c52abcc3d9065daf1fc2c33d425cd37c991405ceae
font_02_sfnt_off0001649e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1649E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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