Malicious PDF — malware analysis report

Static analysis result for SHA-256 d785d0d0bce974b6…

MALICIOUS

PDF

81.8 KB Created: 2021-08-20 07:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7cd70c5e0235ecb26ad946e07640d40e SHA-1: 2d7a864f8fd68c170bed5b6c711ac5942edb6e14 SHA-256: d785d0d0bce974b6d240631d6de6a26ad3d0ccc83e5a74d0549df540dc6a9aeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to distribute malicious content or conduct phishing. The presence of multiple PDF link farm heuristics indicates a deliberate effort to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/4de8bfe00d83916ed5a1277c4b346a08/novag.pdf In PDF document text
    • http://benly-carson.com/product/files/95926299033.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41787dad0---tojukuvuzatodezov.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a70c657b8c---8067929087.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/1os4giccg1kg3llpb9jk9qire2/27426901544.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/28716524437.pdfIn PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/xopebikukozorigof.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/a6a435d90490e9328066f098f0852271/16296993778.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ca2b2f542---xexigifaduvoninakiros.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/f3hg6ovqe0edlrn3dkkdejspev/vepubonixapef.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/tomimubim.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-4-30/20210430201520411720.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/xememebigu.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/48631664836.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608267d35e807---124257145.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/7125475721.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/98412295247.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/0788e5f6edb67363f42d3f163452a255/85581123109.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bbbc3b4fb---97883372910.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210809_F026C48EBB479861.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/9b7739a1fe4eded76f71df2407800259/34364116709.pdfIn PDF document text
    • http://koala-al.com/d/files/xasavofenig.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/75411626668.pdfIn PDF document text
    • http://torgoborud.org/images/file/janulikelawizajom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+get+canva+pro+for+free+studentPDF 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_off0000dc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 10900 bytes
SHA-256: 7be4cc1fe01a16845cbccfa4d60ebc65eba75005d63d670b78ebf9bc20333e0e
font_02_sfnt_off00010dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEC 16484 bytes
SHA-256: 3acec3aa8239c8befbd9508f6041116a9d6b04ecc7d4182fc191b53d60a66cf1

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