Malicious PDF — malware analysis report

Static analysis result for SHA-256 067efac9158d63a3…

MALICIOUS

PDF

76.4 KB Created: 2021-09-15 12:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 058758b742e3dc1d8ef75e80008323f7 SHA-1: 496a3af2210c8999ee5b89ec79ce90ab862ca86e SHA-256: 067efac9158d63a3ef81e29ced2469e968b3699a6669f31324e324870c84e41c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many hosted on disposable domains or compromised CMS uploads, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://spvi.cn/filespath/files/20210914071117.pdf In PDF document text
    • https://mldom.xyz/web/img/podborky/files/80646317634.pdfIn PDF document text
    • https://blokhol.com/upload/files/wedanalixebukasato.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/39055369207.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c1aa17ee6---92812653150.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/56802882224.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/zomanavutapeligutepuzu.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/17920779474.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/81968822675.pdfIn PDF document text
    • https://onderhoudnlgarantie.nl/upload/file/66951170375.pdfIn PDF document text
    • https://maisonforville.be/documents/file/wifawos.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614154c3568ed---sunuxawidusutivokuz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aac3353891---xegolojirogoxi.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/82052764112.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/ganopi.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/nanupatopebaximuliz.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/20816868266.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/86028618430.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/madil.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/17423277380.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=mystery+graph+worksheetsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB200 10572 bytes
SHA-256: a25936e9fa9b7d8488900f6d48575c1a8fcb2f5b49a3357c8e3eb00de25773f8
font_01_sfnt_off0000ca6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6B 18328 bytes
SHA-256: 5f2924eeb183cc59d3c8cb311f678a1f730641269c3893e9bc94356e8d7cb137
font_02_sfnt_off0000e715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE715 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0000ff27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF27 14788 bytes
SHA-256: 45b7567a03e10b7966e48e2aa80693515656a94048a923de6946738044854599

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