Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cdf0545b19a29f…

MALICIOUS

PDF

83.2 KB Created: 2021-09-15 22:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: da09154f47851d92ef347bd08ca0ec9b SHA-1: b64a2efab65e3bde8223398d5136f0bd6dd31a89 SHA-256: 93cdf0545b19a29f65b3b9b6013c8505f87ba876a59be5ecdfa8402d5fdfadfd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs, several of which point to compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and link farms indicates a potential for spearphishing attachment, leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://fornacedelia.it/userfiles/files/1532628397.pdf In PDF document text
    • http://easyreturn.store/userfiles/file/43967232202.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/5d454994d512ef174ec3aa9b636190ea/tuzumamizesiwizes.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/wizitamigok.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/jefabevej.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ae03d41ab---53804415747.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/2b1022e68674f41f33685be0ac716049/zowufoz.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/rawagodepavavitujo.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/tupodotokemabemolad.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/fidafujesiwegiguwavofad.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/dinokijinepatijefu.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/c092cb5ac18e8f442fd5744ca8bc9329/23436488576.pdfIn PDF document text
    • https://bdlvn.com/steel/upload/files/25316359588.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/xepuxisuguvaloroguwawugul.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/30133407452.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/fipipowikukibuvavubux.pdfIn PDF document text
    • http://tartak-monis.pl/tartak/images/file/detesogifarineruxipirefe.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/vawekutomejanokenaj.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/50561628516.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/danulubitar.pdfIn PDF document text
    • http://topp.pl/_topp/file/38792610088.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/jufuvisedosopozema.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2fde14207---xoroxidejo.pdfIn PDF document text
    • http://ocean-ex.com/images/blog/file/59194018930.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/bti2qa2kn4830clf6l9q429e43/89544082772.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=amazon+prime+video+hacked+version+apk+downloadPDF 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_off0000dd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 10968 bytes
SHA-256: 1fc1ee63795909084f57f15a171d6eed99b2dd71b721f92fab98d31f072691c6
font_02_sfnt_off00010e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6A 18280 bytes
SHA-256: c23e11d9d76781cd24500c02e802d7bded919dbeb6fa86fa24181164e2b6c7ee

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