Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccecea6d8102dd7…

MALICIOUS

PDF

93.2 KB Created: 2021-09-14 03:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a955430c289a50f4c85b1b2abdc6b04b SHA-1: 72fbca4ae74670821ee822996fa4dd585c34d946 SHA-256: fccecea6d8102dd7c4da1ac388f315db4cc578251f986f8b7812bf48c585dea5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, with several heuristics indicating it functions as a link farm hosted on potentially compromised CMS platforms. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/c432b7cb7a0c68ee892315ea6c32168e/44309325880.pdf In PDF document text
    • http://hqshop24.com/userfiles/file/90782374193.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/68jp8te6klhnjlo76ll17df6uu/waxesewitukevojef.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/zovimogotajo.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/rabisodu.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/kolotapoxekalojogogap.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/fifaneb.pdfIn PDF document text
    • http://skene.es/userfiles/file/76179245334.pdfIn PDF document text
    • http://school15-tyumen.ru/f/58724962484.pdfIn PDF document text
    • http://synfarm.com/upload/files/tofufato.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109101044099444.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/94092053008.pdfIn PDF document text
    • https://mediaskills.rs/files/3641617823.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/fosoloromamonufadodopaz.pdfIn PDF document text
    • https://ebooksweb.net/files/file/28451983909.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210904050647.pdfIn PDF document text
    • http://centromp.it/userfiles/files/46055403576.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/vibadejedavutufe.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/5509496869.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/tepupim.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f418e041fd---97409421607.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/tovovogogekilejako.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/voxaxozogo.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name/files/50194487035.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=queen+of+the+damned+onlinePDF link annotation
    • https://rt9.rspo.org/ckfinder/userfiles/files/40791117446.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_off0001071a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071A 18552 bytes
SHA-256: d76e285f6ea9c63cd68b5682834bb148e2146e9b611fa59bed47d83e3eac6192
font_01_sfnt_off0001379b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1379B 10508 bytes
SHA-256: 73dc162bbfb1915742d07a3aa13fd09bfc783504c6edf218f0fa983c4268064a
font_02_sfnt_off00014f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1