Malicious PDF — malware analysis report

Static analysis result for SHA-256 84704ba2016d1a49…

MALICIOUS

PDF

77.9 KB Created: 2021-09-18 07:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e71e279ba565d018d9ae4ec6a25af5ab SHA-1: b6d793cc6614053ce94d1a4d4247172d7ada826c SHA-256: 84704ba2016d1a49b9b42a6999fe6468006b952b87e7f5febfa00001434aaca7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The embedded URLs, such as 'https://catamma.ru/uplcv?utm_term=dr+now+diet+plan+menu+pdf', are likely used to redirect users to malicious content.

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 https://catamma.ru/uplcv?utm_term=dr+now+diet+plan+menu+pdf PDF link annotation
    • https://wic-net.com/userfiles/file/96567480646.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/nimewa.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c838466f29---sifanuwux.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/lexekig.pdfIn PDF document text
    • http://hkalc.com/userfiles/92735542087.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/91189242975.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16144d03e11dbd---91173826470.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f18075933d38b39b3ca719b8a0f357fc/sitakamuf.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/pozegegozelaporud.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/ligeleguwopu.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/buvaluj.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141c5b1e4608---gewagupogapak.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/dutazinagisukavafosa.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ratuvad.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/jabefofote.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c770c564c---saxeximokolafeto.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/zaruxafiwe.pdfIn PDF document text
    • http://mweb.cz/images/file/wixebatavozudake.pdfIn PDF document text
    • http://araulmor.tel-cor.com/images/library/file/83786252637.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/bokudopefovonunezivu.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/tibemofitosuxikumogi.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/figojaxixabufikakisugib.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/74187599365.pdfIn PDF document text
    • 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_off0000cddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDF 17008 bytes
SHA-256: ec13c474f2e67684a0e5cfccdab1adffc3fb9a2493b5299b8a7839047a2f3de2
font_01_sfnt_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BF 10676 bytes
SHA-256: 43725bc265dc37dc44c85fc18652d181bed440420968666bdd03b61d49fcd667

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