Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c207cabaf5866b…

MALICIOUS

PDF

85.0 KB Created: 2021-09-06 21:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5c02dcb074f3ce89fa974d85bc54b514 SHA-1: a00642772616203e408b8e8f912dadddb2baa097 SHA-256: 46c207cabaf5866b8878a03cebfee95dd2d053cba1b26c787319aa8415dfa1c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 WordPress installations or disposable domains. The primary purpose appears to be directing users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://cructi.ru/uplcv?utm_term=application.worksheetfunction.match+error+1004 PDF link annotation
    • https://clifestyle.net/uploades/userfiles/file/31320636733.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/jusibubosudazuzetunexat.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607445bf53939---mekilarupakafogix.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/5a2a4f2338e1ee5de52cc6d8a2337e78/45058421199.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/82fca75a3ebb7e6e7c0e1b4a4141bba4/badakekuto.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/43500441599.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/76248180037.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f84264afb---67305643313.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/94897338304.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/27847445996.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1611adba28b15c---dedurase.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/sasajazubaxidapaxelefuxe.pdfIn PDF document text
    • http://hiniceshine.com/upload/lujeluxofimigefovuzekoxe.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353cc913b87---regutagajegulupuxigemivuj.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68f28dabfa---56885363934.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/8093952484.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210629031345.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/15738253436.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608491a776cc2---furojazezesegejilalabuw.pdfIn PDF document text
    • http://seamacros.com/upload/file/pajipipaz.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210901232110.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f07fe42a9d---9782943365.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/04ec3an64ksap561acnairkq20/zodojebadikogenuwekofa.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/mizamoxidedejedut.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612cbab664217---dinomibotesasu.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_off0000e2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B1 11324 bytes
SHA-256: d80ec96c2d91162d636335df11939d9d915cfb9df4fe36310dc00150e553cc2d
font_01_sfnt_off0000fd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 18600 bytes
SHA-256: 82c32ff9e34112eedad368dad8804ec5110721821f5a99a95f4242281dc92e11
font_02_sfnt_off00012e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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