Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0e48b8438e01d7…

MALICIOUS

PDF

82.7 KB Created: 2021-09-17 15:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 4fe2c8ffc741687fc40dd4516ec51a66 SHA-1: f42198e8bef79f43c8df2173eb4c771700d3c129 SHA-256: 3e0e48b8438e01d7245efadc2641a268e65e9dbf68335f0f87fcbb439f545a7b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which are hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are presented as a link farm to disguise their true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://huntic.ru/uplcv?utm_term=shadow+fight+2+titan+mod+apk+download PDF link annotation
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161395cef044e1---24377075142.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9d00de6e1c25facfe14aaf1982e45843/22862343728.pdfIn PDF document text
    • https://pixel.bg/img/file/98730801408.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/walawemudo.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/mesitejelapufik.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/m4hha05e6k559elio4ost2k2or/31852349113.pdfIn PDF document text
    • http://workontext.ru/media/file/dimaganerijivo.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/romozevuzu.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/80509585079.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/65159786174.pdfIn PDF document text
    • https://highrise.pl/file/21249835696.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/godavuxut.pdfIn PDF document text
    • https://rajakedua.com/contents/files/14932063509.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/66998461949.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/rebivusa.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/bopavebesimuwesugebiz.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/73360139045.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/1illq5ase9ovkd0m7qb7vvnpkl/81636731659.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/88489213173.pdfIn PDF document text
    • http://vocal.bpv.su/content/files/files/sirulenelatanojan.pdfIn PDF document text
    • https://kuepancong.com/contents/files/moseru.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/98005537430.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/45427723957.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_off0000df8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A4 10920 bytes
SHA-256: b51ca805bc07e9e04a4444a5182173aa1d9e0238e327181e54d94705fea4d327
font_02_sfnt_off0001109d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109D 17124 bytes
SHA-256: f27746b335fbae4376c234de15da9f24f94632fdde116ca9c8a2692603eebccb

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