Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37a46c0ca3d4771…

MALICIOUS

PDF

86.0 KB Created: 2021-07-05 14:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7de8ba8539b613896f6bb5f4f986047e SHA-1: da722a4cadf50c8982f565712a54983fbb2ce9f1 SHA-256: b37a46c0ca3d47714d859efa6c09aa97244fa6dc0a272ba84e245b26648a73e4
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. The heuristics indicate a link farm designed to host or redirect to malicious content, with ClamAV specifically identifying it as a phishing trojan. The embedded JavaScript likely facilitates the redirection or download of further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/427622f26484ffa3d992afdc50765e10/beworadonanerofowel.pdf In PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/6f04a6423947d7ef4c00fb4b9b699f9a/guliru.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/43789811660.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/foludobiguk.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/38304865221.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71e308c341---63338016723.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/314b543297f41cf6df4817b9e5114c6a/rogedakaz.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c4gkp7birh0re4if34l78m4eu0/subozirazatuwudida.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/06/03/30037301685.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6642ae3d49---notavax.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/xapadazujez.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/4522913812.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090374b0c89e---96634495374.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210608112835.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/bf1c828f0535ff01ec41ece9c59ee1ae/92910394722.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/36389609239.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160719e4a55cbd---78349282026.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210527222442265.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06e9c8ab24---galanidirabuxolexarerow.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/e52a0f805a47f002c2924390b73bfeb1/15940746277.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607603a011138---ritaketotoliwebunuwodab.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/62d285b25ec650ab1dc419f0b9fca2ce/45888785465.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/03dbdce9289fe948d117f25552d53e3c/sadiredad.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaa4521934---xogewomovukedapigus.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/60620029357.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/60926961025.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=90+tv+trivia+questions+and+answersPDF 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_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 10784 bytes
SHA-256: 84da3c25b8df2791ffbe9b4cbad2a705569e75da0d7b34af40fb2ffe4900bd21
font_01_sfnt_off00010490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10490 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA2 17700 bytes
SHA-256: cfd3c8c304c74686f886310f9e831d6e9c1f84afa0bc68e02341d2f341dd1d7d

Open this report in the interactive analyzer, or submit your own file for analysis.