Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda7c81e8b7f7f3c…

MALICIOUS

PDF

87.1 KB Created: 2021-09-01 15:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dac35b03d011992ee6f5728e9c52de1e SHA-1: 1b5a5e154cb70c4c1ee24c05127b7f36686d3406 SHA-256: bda7c81e8b7f7f3c4ce0e5d476485d7ab7d69aae8942748d1b8ca82743c7ce1c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://hagelkonzept.de/userfiles/file/pogefigezo.pdf In PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6a76b4f815---60249853384.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/96nqlliv0gt29pr4njmhc9950t/27685710021.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/14722746066.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/86244015616.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/18129878623.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161106dc5cd5bc---68216491164.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/47703155665.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e7c817413e---gifipijexomuvifuzetobodaw.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/33018436951.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723a2e0d4b0---solunolajopijew.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f548cc924f---74637494812.pdfIn PDF document text
    • https://dptech.vn/uploads/files/modemumifu.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/jasadat.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202108190404325462.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/fa75d12058a8b76fde809ba283e44e78/muwemopumuluximivuwag.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/32596967796.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/teforuworusowofebuf.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/fumalawikotupiwudadow.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ff3jb2otd3o0enmptoedk7lm5a/65543041019.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/91894548fbb9174a345310d35c2873cc/8685147699.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/87938443008.pdfIn PDF document text
    • https://motiv8workout.com/up/files/talutodil.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/nubikozedarufuwonix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=the+bell+jar+wasPDF 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_off0000efe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE5 18348 bytes
SHA-256: b84b8cd47b70b6757cd548ddc03e449a9f87bfddff0f5c98137fa29cb43f34fd
font_01_sfnt_off00011f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5F 10112 bytes
SHA-256: bbe8c12e3f4d94d0ea010ab49ecc5cde03924efbe2702fab2229ff60b6369ec2
font_02_sfnt_off00013623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13623 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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