Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c4b3082677f809…

MALICIOUS

PDF

84.9 KB Created: 2021-09-18 15:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9fb6bd821d82008926e9548a62079486 SHA-1: a4c98841cabab8b273312df685b53d3259464c6f SHA-256: 68c4b3082677f8093b69fecd62ea2e0b2c302d5f6f8d9993b700f6f054d5ff6e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious workflow, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aca71c7d18---67429625893.pdf In PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/44189112420.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/lanonoxa.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/8af7dc4b5c25885811215650f5b6a44e/gezugawi.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/xudoxotinibi.pdfIn PDF document text
    • https://rtaadmin.mrv-educationservices.com/content_file/files/pabojez.pdfIn PDF document text
    • http://topoint.net/userfiles/fckFile/20210904161244.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/5950693076.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/zikifeveradufuz.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/96795654334.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/rizekatifosoruzeni.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/7299658cc1a9551a94c9b4fdf3af4677/79167127394.pdfIn PDF document text
    • http://khamranghaiphong.com/upload/files/leladokogimogi.pdfIn PDF document text
    • http://watch62.ru/files/files/kusixazofoxe.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/wavojotagonexiveke.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/5fc40b6ab58865719a35572b4b9c5ecd/gipubed.pdfIn PDF document text
    • https://projetovm.com/uploads/files/97000706652.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/bekunivarotelafo.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fada1d214f---kajiredavubebotakivekana.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/1846876900613981157f7e6.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/biboz.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/89418366540.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/43397623773.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=black+ops+zombies+mod+apkPDF 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_off0000e7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A6 10720 bytes
SHA-256: e48a80847a11c4153b1a40eb64d71824c49dde7a3b77639c4a3a97ea60f73c27
font_01_sfnt_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 17596 bytes
SHA-256: 490f990200d6e403b6397b11eaff956b9021f56217ade00b20d65b63095b176b
font_02_sfnt_off00012da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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