Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29e1ec2262a29ef…

MALICIOUS

PDF

78.6 KB Created: 2021-07-02 07:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 505bca910579ab4d70bec73efdcfd840 SHA-1: 12d6923161681dcb95a7f21fe81c43ffdcadbbd9 SHA-256: f29e1ec2262a29ef9117c305d6355295c4f072a256af043981187a0cbc53b389
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a715d762ec---12182652861.pdf In PDF document text
    • https://atcotourismtravel.com/userfiles/file/97478935619.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608220460833e---xowesikojusipojubibomu.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/depepiw.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa75c4589a6---gurekinojexidego.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/9b0c500391523235f15941f912428c2b/kazepeti.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/mk8uuin268mcnlf6evgkfkv60m/52786252337.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/gowozaregilewina.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/ae1a153042ab0833fd0dc54d79efb8ed/jijutedanalagobu.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/b2687d39a67c27907e581383f844d627/77257366083.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/080484096259365b9df9b7313ab729e4/nuzajaragunajopetobep.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/67addbece4bd95106284f52924df8f06/35828248793.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6a79c9b22---gokazojipiro.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/0853a7047069ad399545d3e6a5153134/nepod.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/4a57vqn0u6ehqp0tm7qfmkfp15/18399973054.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b221c21c494---67079275142.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/ef743e049337bde4fa5ea3c8ae7dea75/gonurunuwetunitaganoto.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/99295729617.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe2b0ab7d0---mesurefidikip.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/90329387247.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/806731fb5b120abee194e10cc389fac4/mivavefi.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a26a463a0---4290647988.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/nuvutewavebuku.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/969e0a9cf014f5a11f0e823d93b5df54/nezesibupenizavaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=amy+cassidy+ned%27s+declassifiedPDF 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_off0000ce69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE69 10448 bytes
SHA-256: 27e00709b6d19e5832bf1ce3a725e35deb0ff0a4820a686df6dfb188450aab12
font_01_sfnt_off0000e624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE624 18132 bytes
SHA-256: c7d79ecdbbed31390345dce6c6c2d8ad12e060449ad66a5c51669c29c928cf8e
font_02_sfnt_off000114f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1