Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6fd8f0b82592da…

MALICIOUS

PDF

97.0 KB Created: 2021-07-28 08:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6e465976d7e834e906339862a4f640f6 SHA-1: c9b2fc4e8a26b5a52ec15669de9af9b54f3c6e08 SHA-256: 2e6fd8f0b82592daaaace1e001136ab5b15ad40ed0f22660a05fd4c9449a7a20
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many distinct hosts and links pointing to potentially compromised WordPress upload storage. The ML classifier and ClamAV also strongly indicated maliciousness. The document's purpose appears to be directing users to a large number of external URLs, likely for phishing or malware distribution, rather than presenting readable content.

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://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a29273b5630---76031528099.pdf In PDF document text
    • https://fedico.ca/upload/editor/file/fidabidufuxutisijoz.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a463082c8c2---rexedixubepuzilez.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0600b4f18---kobukaponev.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160822e3dd3993---68778937194.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/jazixipelepotul.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/3428272158.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c32646d72---7381404335.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa513607d56---9365788499.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/sugowogobexotoz.pdfIn PDF document text
    • http://asustainable.com/global/file/68342395124.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/95039078927.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6f7079d10---murajevusadepobe.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/zumibuviwasi.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724f30d1f3e---18845822170.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/witogoruvupufazetife.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607700840ea34---xedivoguponun.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/78240186152.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4a1ohhho05np4483jkpd65a46/gijirejukevokaziregujagi.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b06006460f3---38284312698.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e3497c8e5---vuvuguj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=auto+clicker+for+ipad+roblox+iosPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AF 17104 bytes
SHA-256: aa24069c6884d44e12e0d53799abdb8192e3f4845edff904457d9ba0906faf65
font_01_sfnt_off00012e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E34 10924 bytes
SHA-256: 0d22ccae2d5d7b9a1b45b33331413c76679ebc4fada864e9992ef68b1706e38b
font_02_sfnt_off00014776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14776 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_03_sfnt_off00015cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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