Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94ceaeda8ed9709…

MALICIOUS

PDF

86.5 KB Created: 2021-09-20 01:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 510d5e7ac6d634826a19190d0bdfe650 SHA-1: df4369bbcb545fbd6476307b62735b9ac5f08cc0 SHA-256: a94ceaeda8ed9709a08bb1f94ec2b624ea921df54e8263ae33885e2e76c985e0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The file contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or appear to be part of a link farm designed to redirect users. The primary attack pattern involves luring users to these potentially malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://archism.ru/uplcv?utm_term=places+to+watch+tv+shows+for+free PDF link annotation
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/lireboran.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e74b80ad4---28291039953.pdfIn PDF document text
    • https://kocarbonag.com/luutru/files/panegugofakudetobawuli.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/rixutijojukegewu.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/80567591214.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e7db7960aa9f70df9f3ebaa8c947f018/pilutujusarakafefokijase.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/94656980300.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/bepasurusovolepixokilalu.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/51282705210.pdfIn PDF document text
    • http://premo.at/userfiles/file/27050636423.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/mazoguberobud.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/nudapofesiraxukemeje.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/fakebolasobi.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/64640718475.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdeace22b4---dojobexuzedebupis.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/81169678973.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/73386472309.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/t5fajamtjge54e45bn6ecsgg53/wedukivinenep.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/xosupesogivurimajej.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/libumixevikuvefosonizado.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357c213430b---34455893480.pdfIn PDF document text
    • https://flammerouge.ch/userfiles/files/98717940071.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/4p4pio3v4s6sjf1712c2p94h9n/58836427424.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/bumegowup.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/96247297415.pdfIn PDF document text
    • 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_off0000ed44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED44 18176 bytes
SHA-256: 56dcb95dc59b4848b3793ad53ddebf4994dede90db08cf43378ac51937481f4c
font_01_sfnt_off00011c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13426 10388 bytes
SHA-256: 2e228e5de886f293d5bfd47a654041bac46daff44a6413c698735751252e4839

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