Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f467d308e6f2e7…

MALICIOUS

PDF

98.4 KB Created: 2021-07-04 17:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 758768425c10a8da9a7c65ea562b4feb SHA-1: e55f32ecd0f40c411203fdee651f0b2888419ee7 SHA-256: 17f467d308e6f2e7ec1ba777e53b8634f8f5f63e070e31c23e0677c60271b417
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, a common tactic for distributing malicious content or phishing lures. ClamAV detection and ML classification strongly indicate malicious intent. Although no scripts were directly extracted, the structure and URL patterns suggest the PDF is designed to redirect users to external resources, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

Heuristics 7

  • 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.
  • 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://eatorhours.org/e-bussiness/fckimages/file/sofoga.pdf In PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/7cju2bsvvf9ev05jk9d29gomg1/62024478966.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/1ef341312cf93d464b0e231fc329b291/62616121097.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/9e664bea57b4424e208b34d51406bfce/35125935514.pdfIn PDF document text
    • https://maisonforville.be/documents/file/kosufepew.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/29nflvdbgnn0qqdsk3dgt3ggas/27912521891.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/jovajo.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/6p5vv3907epefcp3okoh097240/53557536351.pdfIn PDF document text
    • http://cobbpaynefamilyreunion.com/clients/862770/File/tijalirinuvo.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/43120640022.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16077869da2bf1---8990473242.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/de13dbd4c74eee6c722b397b6fe8c3cf/71842421559.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/84636130044.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609747e67f572---264665989.pdfIn PDF document text
    • https://medtek.vn/storage/file/zivafi.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/26534295390.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/wudajamumenuzaxedo.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882bbf261ca---zozobokonilowopubalofese.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/4c0a6270a8163ab423ee063cfde0d93e/ralojajinumemevoxudibev.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/775eb38248b00514988a9f7446426a8e/94099945960.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/225235075022b24b89d05a1ef4d5e726/63898928046.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb2a07a4a0---gisufesururezumepifi.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/donobatofexepaporol.pdfIn PDF document text
    • http://denge.aero/upload/files/mukuvadebeponuxizironufuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=samsung+a10+root+apk+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A6 11036 bytes
SHA-256: 4793d1bf808fe68de6f110402f5948cc2470cb002cb942f914a8ce7ad79f2a9d
font_01_sfnt_off00011d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2B 16372 bytes
SHA-256: 82feda33769c5de960d32c5dd4a09716f85df69c15143b94248927a600a973c1
font_02_sfnt_off000133bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BF 18180 bytes
SHA-256: e634102642d2bf43cc038d183a81da1c7bb705c9756941d7a206f120b95f9f48
font_03_sfnt_off000163ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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