Malicious PDF — malware analysis report

Static analysis result for SHA-256 00dec6f13ac3a195…

MALICIOUS

PDF

86.6 KB Created: 2021-07-23 22:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 53fdc14c387b9b3a6ec58141452b7b60 SHA-1: d7cb94f0aee7f55b49a4a02cd2a2abda0e19063d SHA-256: 00dec6f13ac3a195505fb003ed3f99b98159d5cf1d19737259a6e786625cbd8b
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm used for SEO manipulation or to host malicious content. The embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://brandnewgoods.net/userfiles/file/67411940968.pdf In PDF document text
    • http://fine-cottage.ru/userfiles/file/tewonof.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/84842320230.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/ef0aceea46ea28819223828181513cd4/zikorawego.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160770d85e3b23---53432256031.pdfIn PDF document text
    • https://lesura.net/userfiles/file/32510746210.pdfIn PDF document text
    • http://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/nifisekinig.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/rejolaginoti.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/9fvc28h8g8s3caj5m017dvop32/16962824065.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/babopes.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/mowutobatevenotumofop.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/3t198pbaklhrr3l8p80uu2pjjm/31231595667.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ab1400cb1---lisofam.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/8b5995e88605aa7002bc73fa77c00a26/vameketugimaz.pdfIn PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/nigofawenulozuzer.pdfIn PDF document text
    • https://epiphanych.com/images/file/33791688860.pdfIn PDF document text
    • http://bougerpourstarlight.ca/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/43565225245.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15d49784d0---jujuluwejitaz.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c068871b13b---xiwebefar.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021052320244669.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/kinutopegekidejem.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/88d90c378124ca30af62e859f974beb4/41875694468.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+attach+dyson+ball+vacuum+attachmentsPDF 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_off0000eeff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFF 10940 bytes
SHA-256: 5aada5994ed7e745729eaaf1bb5e730d0fa45b0ae41dbc86f49dedb532aaccfe
font_01_sfnt_off0001083f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083F 16744 bytes
SHA-256: 8053ac32ec0456b6c8297a65294e0bc1aab13e971eb47b7c437489c057549c42
font_02_sfnt_off000133b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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