Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2bca68d6b5a0a0…

MALICIOUS

PDF

81.9 KB Created: 2021-09-08 05:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8efb4c0b300f7964a7f3e930e24f468b SHA-1: 7ed5c7259c9d291449c177146e88d21c403e17e2 SHA-256: ed2bca68d6b5a0a08e2d0996f5fd1055c4e9b221a0681d8d44cd1a0328893031
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://africanhairbraidingsalon.com/userfiles/file/xexalaruzi.pdf In PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210803_6944A750EA410306.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/37544200581.pdfIn PDF document text
    • http://qdjshg.com/files/file/jakisigakatadizabev.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8649e68f16---kekakekowuferaxaxa.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/1d603omealqmlcahhlcsp5ssfh/48357723925.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/49605468580.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa20793514---83327734971.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/alazowo.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/fujexux.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/f08c558cf01854889260a1adc2461492/sobuboxixetituvezelusino.pdfIn PDF document text
    • https://auto826.com/uploads/files/62930208919.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/kivugivimifodukinanefibot.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/53486222116.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/bexadipagulalov.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16089084580ef4---87755867414.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/75885408000.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/51558819670.pdfIn PDF document text
    • https://bepcongnghiepphuchung.vn/userfiles/file/jidadudana.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/soximamikesagagigin.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/39464378757.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=dmrc+new+map+pdf+2018PDF 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_off0000dbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBE 17440 bytes
SHA-256: 116ed3eddeca69341d169c20d2b23575681b3d0a379622c44414ad37ca87229c
font_01_sfnt_off00010918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 10844 bytes
SHA-256: 8ae9fe2d9d2cea28534378f6fce6c6a640190d8204b45fb20895e6723121c5f8
font_02_sfnt_off00012247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12247 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1