Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82ee1eddba98ed0…

MALICIOUS

PDF

92.0 KB Created: 2021-07-31 17:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: f5a62ae62ecef22fb743c2bf1725a744 SHA-1: 4a12e0cb27e94150ad0b35ef7eeed39a2c1f27ca SHA-256: c82ee1eddba98ed0240c93fc7d3d04b4e1c43f483f794fac124189fa87954b2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 6

  • 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.
  • 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://ownlines.com/upfiles/file/gexuviziselepe.pdf In PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/6ef6b05edfbc168d696ceab932d68671/30826124360.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079f754eb111---rafagikugebujipedugozezi.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210731_19F83AD7B753830B.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/70e10f6bd9caa2b30188a8f7f5f6ed38/8948163265.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609682c14d032---zuxawuritepevupesuzil.pdfIn PDF document text
    • http://jaika.in/images/documents/files/sezogazumogexikuxipe.pdfIn PDF document text
    • http://ndt-ultratech.com/files/37820539797.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/10076011855.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/0fss21c3fb5m6m3r266gdtrpmh/48967990399.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/7fbe26f4b6d5b69f67605446bc93aed6/subopawalisuvekadawowogo.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202105201011338756.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/13759ec6808eb1f3f82f4b059cde298b/zidisorawutige.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/lufitazewefeju.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/89438307955.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f54a7d6d61a---gipanagenulivironuxa.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/36381293d5d5f6dd4427e340259e627e/pozipik.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e032246277---nupumazorigoxetaju.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/ce3da2f564d3e2b176a9ce636bf6bb61/newila.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/35550272785.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9b98a1d6---tozebakipuzero.pdfIn PDF document text
    • https://anakmeong.com/contents//files/xokivabusilifufemidoba.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/76602555950.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5ceaa6483ef68e7e67d428b161f0f4e1/fikaguxatasagabagitu.pdfIn PDF document text
    • https://khanikango.in/file/23958523559.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/23403249943.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f8930c35e64---19719216157.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=metformin+side+effects+sleepinessPDF 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_off00010442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10442 10612 bytes
SHA-256: 4ea9e5dac313f490665408d6d86aa98da1131c9cbe2a7bdf76caf500bd501e4c
font_01_sfnt_off00011c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7D 17404 bytes
SHA-256: 84c8ee932a2b442087a0d09ce89fdc3e59d59c977ba2bf4e4b09ec200f7388a0
font_02_sfnt_off00014a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1