Malicious PDF — malware analysis report

Static analysis result for SHA-256 217f829032058cba…

MALICIOUS

PDF

90.5 KB Created: 2021-06-27 08:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 29386de87706b5a1a51bf291bbeb6a23 SHA-1: bb9fd74030e105baaa4afa0d3a05fe318bd87fe8 SHA-256: 217f829032058cba2db584e81e5bd765c155bb31e0bc181917f0a870ad1adb2f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. These links likely serve as a lure to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092525479524---90708611254.pdf In PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/b8ea5f22ac5faed453c305aa9a855017/91742422852.pdfIn PDF document text
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/tuwatozabif.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160983cc00ac83---poregiki.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/2681184367.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/32c1348a43bf06c42fd241668364839e/88051685393.pdfIn PDF document text
    • http://kfbi.ru/content/file/muzanagutawukuxigu.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/nexadaketajifakorowowisod.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210623_B1E5FE2C67A2FE32.pdfIn PDF document text
    • http://vejwun.cz/images/5899460401.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780c19f308f---bowel.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16088012b069ce---bekokekakizu.pdfIn PDF document text
    • https://bloomeng.com/uploads/pijidumumetiw.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a222948a50c---vilip.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/jevopaxunepijelorogume.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/loweparorudugirekijere.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24bf7ada05---74993040145.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/bubijasupunajoli.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f1ab96788---ruvaduz.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c9644b7f0855bc128375a49d9b5e54a6/bonetemi.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/0f3218d0e3a9a522679bf1e90c164567/befizepas.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/nirowifakogosunogibu.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/paxen.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/41d1b338c6e83bd536a14f90d9d86b62/kasegimurasul.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/f1418q8h6n7nnhkaqa45kstdgi/xonusagipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=songtext+rebel+yellPDF 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_off0000e979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE979 18140 bytes
SHA-256: 3cd313fc58de283786fdfdc6f6e418f2d2cc1c4b67629a2f79c5382a9d4a8b9d
font_01_sfnt_off00011700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11700 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F17 10292 bytes
SHA-256: 150c277b4ddf1e574c437ad5f83f0a152d9fc7dd4e465458728452e19ae2c74b
font_03_sfnt_off00014678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14678 16276 bytes
SHA-256: 4fa1f6c226e700ae5173dbc5c5472d2b85ef971c53bf90113287c25aafd95b31