Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47bebade5990c79…

MALICIOUS

PDF

90.6 KB Created: 2021-06-20 20:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5ffee7746d5d9ca0cd8f6acd455a281a SHA-1: eaeacc12708cc39e64dbe64994643fbb83afa790 SHA-256: d47bebade5990c79a88078ab122a4262d0d854d2e1068d72d79e1b3c6e7f9422
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 compromised WordPress sites, a common tactic for distributing phishing lures or malware. ClamAV and ML classifiers strongly indicate malicious intent, specifically classifying it as a phishing trojan. The embedded URLs suggest the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/dnj0dcf8amj0b7qqm8ee4f2b13/nobixalixofoparomumeba.pdf In PDF document text
    • http://mytmbc.org/fckimage/file/43700755156.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608395a131c36---rewuv.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/ab697da52a76c9683eaf831bb377a759/22838752441.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fe6m2qafds7m5rbndgavjckrp/zimosimuzuxuxiwexiz.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/nsvsoim0fm63at8p8qhcjlcq4a/sivowowutatapu.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/bfb828945b9077207477a4a996e560a5/wimiloga.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/moxumenenon.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1f419bfd5df616656fa97b8dc6e0c5f8/9114249192.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10abae78b3---6407744203.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/77601798994.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609415886996d---58382992411.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/rgcr97mckt4hqm9bun07t5tcbl/17306300872.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/fewuti.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/i2a50725q2q6jmka8fjjdn53uv/gedoganomiwijego.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/j2gs3jdv4ti0rac4vv29cu8i9p/jovoporoxi.pdfIn PDF document text
    • https://mmszke.hu/files/file/gamafibebomiboposidezituv.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/707a1f00f33694fbe6ea4398cb38a067/56392414839.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d74328660---53298310739.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=super+smash+flash+2+marioPDF 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://scripts.sil.org/OFLIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 5468 bytes
SHA-256: 996ce666269cad2f69d00499bc82e9a7a0c4087a496838b660cc7251cc27e8e7
font_01_sfnt_off00010935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10935 5376 bytes
SHA-256: 876c150d44288d0416e2d63bf13c30d5d5e9746137fcda4ed00574942d5c08a4
font_02_sfnt_off00011b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4F 10776 bytes
SHA-256: ee02133ffc03fccef59ff27d8330d2964b1170c05eb2c05b8a580346acdbbf37
font_03_sfnt_off00013fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA4 18324 bytes
SHA-256: be7e8f75331d0c68a31bfcd3427bb53c55602576113717b0a9ce1bffe119cf0c

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