Malicious PDF — malware analysis report

Static analysis result for SHA-256 01cd1daac653833a…

MALICIOUS

PDF

83.3 KB Created: 2021-06-28 15:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e68df1057574b986131ccf7dc1dd800b SHA-1: 8b749ba32aa2fa6365584f821db05053f1cd2ea0 SHA-256: 01cd1daac653833aa4313d3ab3271a5a4fa6ca6d23d12e2c2af4f01470ce2aaa
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links likely serve to distribute further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160800c7243489---pitixurixabajib.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cabe0b2bb---getajetasizos.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebb9f77c9d---fidunexosopojaw.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869c14e9ab4---97569374816.pdf
    • http://bilmatbasim.com/userfiles/file/buxoxorezotodugozapuvud.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/ee8c7790d478f11074a67e8543cf8bc7/95315690612.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608779e1a9f2c---32026284154.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/ac6f4dc87b631fe15208271216a1fff7/798327191.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/3db794430b64c1a5b3706c1605dee2cd/20692299712.pdf
    • http://chanakyaaerospacedefence.com/userfiles/file/xefitewise.pdf
    • https://annjulieskarpmo.com/userfiles/file/pawatogikosijunomo.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4c986115e279792d2f8cc3c825590e06/wopufemasizaketoninikasef.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ad9702d76fceaeeed49aeb52e61f8c47/wikakurubezerinuwilib.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4d1724d75---81700155796.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/ed8ffa702fc9193aad66abb4ebd39b36/61431587176.pdf
    • http://mygotour.com/FileData/ckfinder/files/20210606_817195A50B91AE57.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606d965827ba7---mokowugefu.pdf
    • https://rubin2000-distribuitorshop.ro/userfiles/file/xowanonerefawivenunulasup.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d330821579---rudikikexuver.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/761dbb27b167d5ad6dfdcec2c354f927/89467323622.pdf
    • https://sonarmusic.hu/up_image/file/fejirajalevuxikaxamewela.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/qj4d74gn29obto8gvqm7b3g968/gijopomakupelafo.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/0079bc2e8a60a438c0bbd7aa1feb6750/23548505656.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/s6qklde1cdpah41rlpk0cllq52/dimodenetamu.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/zunanudafojanulu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=oxidation+state+of+p
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C3 16792 bytes
font_01_sfnt_off0000f9da.bin
9b2cd9ebdfc7f7cdf9a1ebfd9d2527815c4c707d90f334f460cb1a3d53afea5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DA 10472 bytes
font_02_sfnt_off000111ce.bin
6c56ceb7ee32ff752b26ff6ac01e75b41b3930df4477f623ce01d68251d410fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111CE 17768 bytes

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