Malicious PDF — malware analysis report

Static analysis result for SHA-256 1382ee2fd1cd8cc3…

MALICIOUS

PDF

80.0 KB Created: 2021-09-09 05:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 37cf25e842e5e8811267c46af6d160be SHA-1: b8930d502b93d3050c77733cce92d9c5869c0709 SHA-256: 1382ee2fd1cd8cc303153bef8d7bc385231cc864fa2741cf472364a337bb69a0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to other PDF files hosted on a variety of domains. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates that the PDF is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://pixomot.ru/uplcv?utm_term=breath+of+the+wild+manual+pdf PDF link annotation
    • https://mercerapparelss.com/userfiles/files/66181810803.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/vureta.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139107437bfe---fopiresowawejolisu.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/ranuxogupedifuvimegogop.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/lifezugigejawaxoliseputap.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/tuwaxifuzu.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/fabesatelu.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/41954639634.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/417766806.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/bakofukosisuwafevugala.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/50155330605.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/duvufafe.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/kunoxap.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090318042973499.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/viwixazununajole.pdfIn PDF document text
    • https://tomas-music.com/contents/files/87705552119.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/misofus.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/80537366887.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/099f15e2add35068591b336a468c33ad/20891850270.pdfIn PDF document text
    • http://darstin.com/userfiles/files/vifobijatiwukuvul.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/kazivabowigusutiwob.pdfIn PDF document text
    • http://fortwashington.abwingsmd.com/uploads/files/92814836177.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/27005879511.pdfIn PDF document text
    • 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_off0000d285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD285 18088 bytes
SHA-256: 1da5b65f016fd206305d6d773d4958e9445a22d0eeaef1a787e1b79ed98aa7bb
font_01_sfnt_off0001019d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019D 10836 bytes
SHA-256: d9648eac9291e4ed4eb750aa3d0bd95a74ff9c751e18f4fc05bece1324597252
font_02_sfnt_off00011a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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