Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc33f0491711571…

MALICIOUS

PDF

77.7 KB Created: 2021-09-01 10:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 772b500233af8b7a2747357e37b46602 SHA-1: 6ab91fe8b5f9013828546adbdbf17adf85a81cc8 SHA-256: 3cc33f04917115712738f54facffa37500463f9e320999ca948f8873d210435f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be compromised CMS uploads or hosted on disposable domains. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://garglob.ru/uplcv?utm_term=different+types+of+folktales PDF link annotation
    • http://clarksville.net/wysiwygfiles/file/zuponajilago.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/t08ibnscp99fh2o2k28dp3kmo2/xokizumanok.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/6e1d4100f73e63e1755f2f7b4c1ef137/54410093311.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/tomedaweludevoxirav.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ab692c8eb---kiladipezesozatanow.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/81407725049.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210525151027.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bc44c27f7---potigimu.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59434b22b5---pukobigowoxamizobaxen.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/fe82ab85f0c91fffb8ad16f3451a9f82/40556200531.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/78969021481.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/mozarekub.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/jefazijij.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/30509492152.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff7c41510b---28292370497.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/a099bd6f680807b3ec15b326187446c2/firoxijosages.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/4790150216.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/rofibukurod.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/rerejuxebulofa.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/kupuratifonewiwalikegujiw.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202105270738449514.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD04 10560 bytes
SHA-256: 1c34375d2d972c8766f600425a8654fbf8a56762793f8ad4c39cf4bcdbdcd794
font_01_sfnt_off0000e544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 16984 bytes
SHA-256: 412cfee599cb02486524b56781d0a825b1b6ff88ffae117416944e2b2b69251b
font_02_sfnt_off00011102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11102 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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