Malicious PDF — malware analysis report

Static analysis result for SHA-256 0090f0c4a4216205…

MALICIOUS

PDF

93.8 KB Created: 2021-08-01 09:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7326c92f421ed6f11435b6c3a5ac0499 SHA-1: f26e49fbfea049dc042442a514757303dd72a012 SHA-256: 0090f0c4a42162059d8e6be27b97c039e48f433bf6d1303f35e15d5228419567
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms and appear to be part of a link farm. These links likely serve as a lure to download further malicious content, such as other PDFs or executables. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c78c53da4ff---79969051442.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16085c6f23f3f8---33503456899.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085be35a4a4f---19879698183.pdfIn PDF document text
    • https://ebooksweb.net/files/file/69580916712.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610574a4e314b---rararejefutiguzumovep.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/85fe69f49ba61a58644f2cd1dae487b0/rajezuwunetagipugujofu.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160a05c5d38a81---japosomopus.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/6c7f6b44255639f4a074f5cb32a7b8b9/dopajukik.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/tasorunavoxatakezixis.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/7a9677350d8e3320ee4bc993d36c374c/41934065479.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/6edfceff49f99a70aa547207ef10cd38/kejopis.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/cc0b7391d8f04b33dc3e8513708a8bab/filuxurumilamezovoz.pdfIn PDF document text
    • http://wsm.hk/images/files/xixasa.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/36255679037.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/r1ftmb633ar5a2f89b236hbbtr/70175047207.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/84581857878.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/fbc7628a43056c3d2b319602a9754247/resexix.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/049quo1vtba8enqevhpd1tb5jp/95240584787.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/jarisuwikaz.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/c4dd7e192b9f8abd46c4b679e960beec/jutolomefokapekigijatuv.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/a768653feb1ad4f8f4eb103d88723ca0/77395168278.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/66469805901.pdfIn PDF document text
    • http://yuli-china.ru/d/files/86447963189.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/l8fqof0j856l422mvlag5k6q3i/fakotonoperawijerija.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/nigaxuvafanitaziregej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=fnaf+2+mod+apk+pcPDF 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_off00010a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A12 19344 bytes
SHA-256: aee46a234ee84ee26a9fc7403d2508458e8acf1573d7c8457e46a7d829d48a9d
font_01_sfnt_off00013a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A11 10332 bytes
SHA-256: 291aef0f8a85d5db4881ab66ff9774da6c04c11ce66d65a9c75d049380117eb8
font_02_sfnt_off00015160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15160 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1