Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c8b056060249c4…

MALICIOUS

PDF

88.5 KB Created: 2021-08-10 03:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 97cdba611f3e2dde81970e598e247112 SHA-1: e75f15925e08e2e00255237e1b7fdae3974e8667 SHA-256: c4c8b056060249c497dab721bb7d6ab41718113662f4adc2c2244da3b00cc856
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or scamming. Although no scripts were directly extracted, the PDF structure and link farm heuristics point towards the distribution of further malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://autowagon.it/userfiles/files/93529945544.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba9b799ed2---lozijelufafezerupoj.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/puberow.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/s11l3vbu0cdvio0otk38gntlqe/98448274247.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d12260bc50---77709219690.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/dprpvp8ungf4kdib8ar8eoic7l/fozukusazefal.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/1pqfg7r0l3k7s6a0c8q7eanpci/45563334576.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/3519575850.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7a0909aba---15484994458.pdfIn PDF document text
    • http://strandedtattoo.net/file/95938602287.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/31432402962.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/672dc7b5116e2f7c6379394f094203fe/77945538128.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077406fcdebf---21752680354.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a346911e279---96503058790.pdfIn PDF document text
    • http://capital96.com/userfiles/file/46416530466.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/88kcn65ns6c0o0so49inagcla0/48453973553.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/24516391436.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a650c6a636---52204808307.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a3d348a51---45263785315.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/lokegupedeluxiwuxe.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/zekogeratufasexonukir.pdfIn PDF document text
    • http://home-delighted.com/user_img/files/foxegaruzakelisewafi.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/sanafuziwilinife.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/nijujijurukirugud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+put+bagger+on+toro+lawn+mowerPDF 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_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 10652 bytes
SHA-256: df2254a95747dda57caa2c2024ae63ee566de92d4689b1212a5a0e2c736031de
font_01_sfnt_off00010cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC3 17200 bytes
SHA-256: a3e2e34b6745e4471c02b0d347d1544ccb15b5ff6b1a04f6567f36800209f817
font_02_sfnt_off000139d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.