Malicious PDF — malware analysis report

Static analysis result for SHA-256 3201feea2f7c2c86…

MALICIOUS

PDF

89.1 KB Created: 2021-09-12 10:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 480d59dc1d161880e1449b5dee62a11a SHA-1: 3104a8728ba06165c7f130c1b5d912bbcefdd34b SHA-256: 3201feea2f7c2c867714d1f0f0678b8b56a6ac6c63761af93c9427fb07b11d36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The document functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. While no scripts were directly extracted, the presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest an attempt to manipulate search engine results or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://daisytalavera.com/userfiles/files/moroderaganuxivujagedir.pdf In PDF document text
    • http://consol.hu/images/uploadedimages/file/vagudabofikewugonewaluniw.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137ee3c5a776---suvugegetuwixebivatiwun.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/gikovade.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/ribazurizuwiselotigod.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/dtj81fp2acaa5qinp4c0h5ggde/43817151533.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-7/20210907231754239308.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/radojovovijulesoboxevi.pdfIn PDF document text
    • http://superazs.ru/images/news/file/31951869416.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/zeroxufu.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/15d8969ec04f41e40c7987c27d2d3f44/95026265804.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/47343696232.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/gofuwemetete.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/xamefuto.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/69599293462.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/5242920552.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/efcb0f061712cd0c899cdebe6f6651f5/xedobifag.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/50121740755.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/99840769287.pdfIn PDF document text
    • https://ww150003.linebot.net/upfile/files/20210905232139.pdfIn PDF document text
    • https://mklaassen.nl/images/file/xefevinomadol.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ffee19fc3---78645742515.pdfIn PDF document text
    • http://4darchitecture.org/img/all/salulerovemo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=pokemon+offline+games+download+in+play+storePDF 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_off0000f836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF836 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11048 17200 bytes
SHA-256: 9a7c07e56db55b95d78ce7d1c2548fe5d0bfb9287ca8d0c52a2cb5fbb812aca6
font_02_sfnt_off00013d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D0E 11136 bytes
SHA-256: 2d0ef5dc4213ef12e2f3e1bcfc96955edda71cf6e1042f03f13f1fa10a4c19de

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