Malicious PDF — malware analysis report

Static analysis result for SHA-256 65eaea4ed2ca6b87…

MALICIOUS

PDF

90.0 KB Created: 2021-09-19 06:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d0c05a2b3c1b07c2946cd12e981cccdc SHA-1: d7a1c6e2e4d2e1f5763e5ba5ffa77016c8a8299a SHA-256: 65eaea4ed2ca6b8745297f9c86af0ae516ef8956fff747aa2a8f690321e5b4e1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=tokyo+ghoul+live+action+full+movie+english+dub PDF link annotation
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/rotijelogarapawidobef.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210905_8F9F23B093522C49.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/65344761181.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/50560829573.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/57811213045.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210917_E1C0D60A7B1A70A0.pdfIn PDF document text
    • https://magatek.com/documents/file/tefare.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/51830733136.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/f4326bf875144006b262b9fbdc675559/meditoxojipokofapakalado.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145a9c43f0d4---porolefituvazij.pdfIn PDF document text
    • http://infinity-c-t.com/userfiles/file/bugowa.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/renorusafe.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/2405687382.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109110100095062.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9a039b11b35c9d3def0428f652877d8d/86160047192.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161377e273d9d5---4473013253.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/fipulipuwareriwutuzeb.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/13402998428.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/tekabotorivu.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/mupomigajapaxoluvoxasew.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/161467f3771eb3---nagitawodasenawizigo.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/topomudapi.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_off0000f1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 20160 bytes
SHA-256: 345a65cfdc622d38cdef2d24e65981b613af554fd306093dca034112536ce630
font_01_sfnt_off000127aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC1 11300 bytes
SHA-256: b3f83c2c0e63d6b44a15af995c27880cc97cb7218b309b30049cb743ab4c4661

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