Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b452c955fc481c3…

MALICIOUS

PDF

85.3 KB Created: 2021-06-28 13:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 624e7b6d152dd57813beb713a7bc72e3 SHA-1: 711a4112e286e4b81f336649711246998cfadaf8 SHA-256: 2b452c955fc481c3d08bad9f2b58b084e9df41e7edf4bf5d71000742b774e0ef
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and a high number of links suggests an attempt to manipulate search engine results or distribute phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://aslimitada.com/userfiles/file/denotozigepofuleve.pdf In PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/881b907a7143212053c74a348b50d68e/32615187187.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1dbe5a8d9---24828181819.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/lituwujiv.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/82552175310.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/9721145192.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc5caccfd4---83972945893.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada9bc3b738---25117673372.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d99f8d6fb62---26853279027.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/55681024884.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cac6ca82b7f---46275177062.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12039176317.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/2jmd1ftt3qi0p564u35bih8aa0/kuwoserup.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/58047826469.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/lugeximag.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/15262865503.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/53969378907.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d296ebb759---90903856372.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/tadelimorodukorovi.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd07fb6eba---75461709985.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/lagavopezedotaret.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/47109900386.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/44846823215.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607126e35aafb---wijobupapuba.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098073720ffa---99729600511.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160818f994eeb5---jolul.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c53233b9228---56315038140.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/ludaxiri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+put+citations+on+powerpoint+slidesPDF 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_off0000e4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F9 19400 bytes
SHA-256: 16c4fdd75f6fd3109ca664309eca2060fd02b70da86cb65293faa2cec5302537
font_01_sfnt_off00011670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11670 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E87 10684 bytes
SHA-256: b63a99c1708112f03c630a6d3bc502ae84d069aa46171242336e10f78ee9b1be

Open this report in the interactive analyzer, or submit your own file for analysis.