Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac3f02b596324b2…

MALICIOUS

PDF

87.8 KB Created: 2021-09-05 00:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5ab75fea9a05b305bcaa0f657d2d7b23 SHA-1: ca0f2dd96bf110b58549513ed64ec03931632b87 SHA-256: 2ac3f02b596324b2941d9a5f33c7ac3afffe9c6fe7c4b7266bed598e77486527
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/66128593230.pdf In PDF document text
    • http://seanmore.com/userData/board/file/32633480959.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/f9dfa73f3510da6ff62a239de664a019/zifevufugu.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bc5db4749---98527272429.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e1c357e4c---votuxexumumafuvutape.pdfIn PDF document text
    • http://staropolski.net/Upload/file/25634347047.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9059486068.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a430b338f51---79786724814.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210822_113044.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/783h8guvd14tlqr9d3rioplha2/liluwofuwefodu.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/zinafevubik.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/41609394234.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9b86aea7e---43031243253.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/819b91286ee1832a979a5c8b72378c9d/24212910873.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160873d777feb7---20108994531.pdfIn PDF document text
    • https://xcheck.vn/uploads/userfiles/file/rimirorujikir.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/78187347873.pdfIn PDF document text
    • http://grotech.in/userfiles/file/pedikej.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/penaripinabupenu.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/kofadugo.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/givoziludatidar.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/dnko7d4pih3sl6af5jkn2gne85/vewado.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/5d0c35b251b2afccf6676147c79e2875/40314162109.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/getusigokuvilesev.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6b9b6505c---mevedimapurekumizab.pdfIn PDF document text
    • http://www.everystockphoto.com/photo.php?imageid=1656919In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=subaru+forester+2002+user+manualPDF 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_off0000f21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A30 17888 bytes
SHA-256: 9e56e3adf61acb55cae6325d3be93b24355d916b93565d86c836ddf15e81fb2e
font_02_sfnt_off00013868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13868 10840 bytes
SHA-256: 45151ce7779d340e3979e208df65b961253fbbb812e76818de41e65fb50d42d8

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