Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00692d0a2a17a59…

MALICIOUS

PDF

79.9 KB Created: 2021-08-29 04:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0deff61e54bd01e3973f3f3e60b3ab1a SHA-1: 0d0bc337dcdc609afcb754f8af3cc89a2cdf2dd5 SHA-256: e00692d0a2a17a59a43cec70814ca301f5d8c8cba62493a43c7472b5083d6d36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc9beac910---85708408001.pdf In PDF document text
    • https://marljivo.hr/userfiles/file/69099847227.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-23/20210523012112365729.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ee29d955626359c96e493451fda0f26b/nujazikixumunugizirasomu.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e94b3167a2b---46333502710.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe91fece67---25251662542.pdfIn PDF document text
    • http://esistore.be/userfiles/file/wodexozefo.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a99e3aeb645---tiwezosakorapibagaxoman.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/e0ea1bee64b9b2915b427d2d34ed2f9c/58457171207.pdfIn PDF document text
    • http://sparkpro.lv/content/file/18201612163.pdfIn PDF document text
    • http://synphabase.ch/upload/file/wubini.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/d235103baaa32b3a94fd9f2948e9a850/womewegedumoraluloxagavaz.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/78151232157.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1611ca150c1e11---56859471108.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/vefefadozafesini.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/50353278035.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ab7c7629e3919a1580b239db87cd5c8/48178782146.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/6bed1f65b906573294fb160eb2109c0b/torofosugekuv.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/60961253761.pdfIn PDF document text
    • http://atomleasing.ru/media/File/17040832610.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/ffc4ac9ece326ec09cbeeeb7d2b7edf8/49700336552.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/fepesagavanunakirufu.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/wegumupuvonudipowuk.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/89058536263.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=vn+hack+pubg+mobile+androidPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC937 10996 bytes
SHA-256: efe3f44a7b8126b798c7116f9adc1a398d52d00233e57e3235ad9134ebcac176
font_01_sfnt_off0000e212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 21228 bytes
SHA-256: 1d21b72dfa8e779c7db9d394c04a70b000fddef7be48056432c041ce00625a9c
font_02_sfnt_off00011815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11815 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1