Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ea32a214b6ae9c…

MALICIOUS

PDF

102.4 KB Created: 2021-08-27 01:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4a83be75a76a6036dc3bb808f31dcb1b SHA-1: b32e6dbd3c7d9332b93ec293a1f044619752e424 SHA-256: 38ea32a214b6ae9ce6e40eebe6b736fae7defff1ecd21022bc8659f06efd9b4d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm with numerous URLs pointing to various websites. Several of these URLs are hosted on compromised CMS platforms or disposable domains, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9878

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://tano-cable.com/d/files/duzokuze.pdf In PDF document text
    • https://dancleland.com/img/upload/file/wimewetipukanolil.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/pejefositusalafigikaxug.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcf45dc40f---93550101027.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/wefulebazalinigatule.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/45454185490.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/zazagigipudoza.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/5c3cc9103276ced3161d212639c57629/85546705780.pdfIn PDF document text
    • http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/seselewinanopirif.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f0b5f23f2---68187268831.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/f9590f6169f52beb0a7dde14511b3e32/79585093069.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161264570f16dd---58562542281.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/wixasenawalatim.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609a635114907---30624350382.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/tebuw.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/86262971405.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/72260951797.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/129e56bfc4e3c48f48c846439fca1464/punokebegozanuwazemusomu.pdfIn PDF document text
    • http://usmleworkout.com/files/file/27517886301.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086b5e919a54---33845307725.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/fanovokaxosefe.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/katexuxoko.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/f36ea0655c5ff3138eb9f7ccd88600cb/fivexo.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/damorowo.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a73f926938e---74014424239.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16081bd8935eea---30988163838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=narcissistic+personality+disorder+books+pdfPDF 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_off00012ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF6 10936 bytes
SHA-256: 0d519e8eada67460de9a5ba6f2db431ae3fa1e76daebf70b2cb6c14a0c9019a1
font_01_sfnt_off0001483e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1483E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16050 16308 bytes
SHA-256: 468a3a5cc9ed3bdfe29e4e1e5e5a308b1638b94dd0ea652f1d2e830f5a1fc4bf