Malicious PDF — malware analysis report

Static analysis result for SHA-256 2968c3b507af099e…

MALICIOUS

PDF

84.6 KB Created: 2021-08-16 03:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 24f16fa5d5ae72dfe803f2442527d058 SHA-1: 1f914631d5e69f6344cefb802e8eba51f3623fe9 SHA-256: 2968c3b507af099e770b7f360c38b4ffb11b34403ef3e36ea72784d92eba8d16
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a link farm pointing to various domains, some of which are compromised WordPress sites, suggesting an effort to distribute further malicious content or phish for credentials. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a strategy to obscure the true destination and potentially leverage SEO tactics for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=vegas+crime+simulator+2+game+mod+apk+download PDF link annotation
    • http://lucchetta.net/userfiles/files/kofewarowolosufi.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25aa354b79---napinex.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/m6m9be89e6vs2u4pvfh5l8udug/xosadijavumuzuxabiv.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-6-17/20210617154826993896.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/64650448501.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/lajufunogabozoxufurowemak.pdfIn PDF document text
    • https://flomogroup.com/upload/files/sutunefalavaxoropiwido.pdfIn PDF document text
    • https://parfumzone.ro/files/file/9109118937.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7a509e41f---65226541815.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/80041997364.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/fajenimonamowewonil.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/vanogugolipigivoxaxofod.pdfIn PDF document text
    • http://poorclarescork.ie/images/97796773558.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7820c7b42---nasiminowupiwe.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/xumamamojemajumolijebuj.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160847cb6a5326---zorogukode.pdfIn PDF document text
    • http://ligneus.hu/upload/file/niganigulitezuzuviwuta.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cc58f98851d---50802494498.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/3f6f9f08edb92a7af28bc7b408d77f0f/6391986642.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/drof0hdb02u1hskehla2m9rb80/bonezoboworanenilevo.pdfIn PDF document text
    • http://taxfreepoint.com/file/jijasafebepejuxa.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/309pfvper1eauug8tgm5j0pse2/palebe.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/balowiwowemuwafobi.pdfIn PDF document text
    • http://u15.ch/ckfinder/userfiles/files/zikoxidibigumipur.pdfIn PDF document text
    • https://thietbiytedaibao.com/media/files/kanawuj.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_off0000e5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E7 16652 bytes
SHA-256: 17cb7cb825066e0c6a155d135ecedd13a547f6120a8ebe5915d30a849eaf5b11
font_01_sfnt_off000110ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FF 11224 bytes
SHA-256: 5ba906f436905b403c7e7d27ed21f1d2c8b01de36eb184a0940dd34e78802ee6
font_02_sfnt_off00012b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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