Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e40f75cbd8e44bc…

MALICIOUS

PDF

106.4 KB Created: 2021-07-07 07:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ecd29beb730766d5b2302e6886d47d1e SHA-1: 27967995d1438aa5f7e29386911088aa40d84d6b SHA-256: 0e40f75cbd8e44bc20b10f7e7caa034200397b4f82cb1c3efcf425dee3ff1904
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or scam attempt. The file's structure as a link farm is a common tactic for distributing malicious content or leading users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://interreg-ipa-husrb.com/downloads/tabozufojurexafirivukakog.pdf In PDF document text
    • https://agentcctv.com/userfiles/file/31391935376.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data//files/47806426406.pdfIn PDF document text
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/75340672218.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/a385470b97723a4ba7b56420bc9c6bdc/rewadamufotadojag.pdfIn PDF document text
    • http://doverhighschoolhalloffame.com/clients/2/2d/2d76883e1086210ef8e2c43836b0327f/File/gujigeduxumesabapejen.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/6qvrfia2e4fi6shita74tleum0/nekemasisesifofe.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/69541131865.pdfIn PDF document text
    • http://vo23.ru/upload/file/77872543787.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/e3e465743d16f41f613bbb7927001314/sodulufojusan.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/fevano.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7e29ca97b---91904725894.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/877bc09e5d87a70a1827da352b12bef9/65386548412.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/52613627736.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/nomikevojularup.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/fbd4ba49d85a607fcd74bc607ce3afb8/20347151873.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/76868773718.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/97474147621.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/b6ec64462515b01585b7cb23baed2c73/61272049790.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/72765623708.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/ranutase.pdfIn PDF document text
    • http://pinetreerealty.ca/clients/55933/File/20711900671.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908ba0b448e---namofutemem.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45c2869140---21481118097.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d3d82843aaa8c655155d04cdbfc719d4/vazasarenejed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+figure+calories+to+lose+weightPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C20 17300 bytes
SHA-256: a89fb14669bf747523338d9214a2888f19f51bcad9c246dcf4ffd2b4e0cb811b
font_01_sfnt_off00016984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16984 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001819b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1819B 10688 bytes
SHA-256: b37fdf7798a8834dfc6d0cb3dd1acefdbdb374b876f126989fb6c101f6d1b98a