Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c19d9a0f70d7f7…

MALICIOUS

PDF

158.9 KB Created: 2021-07-28 04:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a1fbc2f306f9373d7f4a839eb567c843 SHA-1: 9bea938d00d5c4356d30e0152b26f38185784d43 SHA-256: f9c19d9a0f70d7f7bdc2136657bc80b82021e295cde23408e9195ad3120f5c41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute traffic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9547

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://aadhaarretail.com/administrator/imagetemp/file/xowufuvagekovulapovalofux.pdf In PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/70666175542.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcc79bed82---48248027345.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/nitalofariliwilad.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/gifawasune.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/ce0cee4718be8151a507b7c3be9568e6/lugavosuditexomosakani.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210505073002.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15981dfa94---bagereduxikijezowamub.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0ce0a7221---81041785211.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/33070361088.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/93422407796.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160abc27c52854---19673313140.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b35362728d---muvurafiwesilabelisigiker.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/20690716306.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/44020373183.pdfIn PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/zajugeja.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/atafdpudvlqfb1tmp7bmnmouva/lolewomiwizapu.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bb78d2c3c---ripanusewe.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/janosomugin.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/lorokurubasebewemosatisev.pdfIn PDF document text
    • http://3sdent.com/upload/files/zerivate.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/av06rv0iva2t2jprt67e30b0f4/58357116225.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/36138560513.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160727c852bbe2---wekodexawonotinajejafu.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/69274131830.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=pokemon+platinum+action+replay+codes+shiny+wild+pokemonPDF 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_off0001f2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F2D5 11172 bytes
SHA-256: baea142fee5377c81dd6ef41cb0c4d29284a8a92a5c5fc7fb1b6306c00f6db7a
font_01_sfnt_off00020cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20CD5 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_02_sfnt_off000222b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x222B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00023ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23AC7 18460 bytes
SHA-256: 012feac67d34a47bcce4a1036e4583c9e03099609ee0595a7e2a2647ee3d15d3

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