Malicious PDF — malware analysis report

Static analysis result for SHA-256 accbc64ee9b1cd6d…

MALICIOUS

PDF

98.3 KB Created: 2021-08-14 01:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9bf230804b744338540002a64032812d SHA-1: b6ef9d6f93b453c718edcb10c658f2b70d9b1855 SHA-256: accbc64ee9b1cd6d932afccbf7ff84b31d06024e986653dc55c774eb8852ed3a
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 malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous compromised WordPress upload sites and other disposable hosting domains. The primary purpose appears to be to distribute malicious content or facilitate phishing through these numerous links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942187db8a7---lutedexerotepo.pdf In PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/c63099da1943c2603c21b62792f27f9d/19448008257.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/gilevazewumogexab.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/vududodim.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lafifidefuk.pdfIn PDF document text
    • http://donghotam.com/luutru/files/84378643269.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607288702a6e0---27573938671.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/lewudojoretewutanibupot.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610081569037c---lunerusizijij.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/35394189574.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/efnahkndj50jt5nigfoe0s6v6c/zitabekelakanubatitasuwex.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/44894574882.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8a654a85b---lawajo.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/92316569254.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/pekowaneduginibalidoxa.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608105e770fdb---48653896845.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///kenolibetanixapapadiramud.pdfIn PDF document text
    • https://lanegarrett.net/userfiles/file/92394804226.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607176bd0fa23---sonozisokekolivida.pdfIn PDF document text
    • http://fuga-hotel.com/CKEdit/upload/files/76302429274.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092516c265b0---5085012699.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/44607840430.pdfIn PDF document text
    • https://pmms-online.com/assets/file/volitutusezeb.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/jaliwevilexigamil.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed2cd2cfe7b---vosikapinivirolaletoza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=perdida+de+carga+en+conductos+de+ventilacionPDF 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_off000116cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CF 10712 bytes
SHA-256: f027c94c750f56871fb55a3029dcc54550454c7cdf0909dc206934225d1f9322
font_01_sfnt_off00012f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F59 18940 bytes
SHA-256: 0e63de3b9f4642b277f8082703ccdb05e797136ea6cf7eaaac7664f429e976f9
font_02_sfnt_off000160db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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