Malicious PDF — malware analysis report

Static analysis result for SHA-256 017e957004529ee2…

MALICIOUS

PDF

80.7 KB Created: 2021-09-09 16:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: baa4b67cf77f75ab7d85d3ed2e0894eb SHA-1: 4c73d7034a92c798ab02f114c9e49cf1c4e39c51 SHA-256: 017e957004529ee2d5ea1b9712835299c5ad64827df535e6bcd76a187f66b17d
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/fulapabilenizolugum.pdf In PDF document text
    • https://sikahaiphong.com/images/news/files/65613104284.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210905_A2443C91B533914E.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64997465555.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/zujetu.pdfIn PDF document text
    • http://ramenhajimetustin.com/uploads/files/29105218930.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/58069459433.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109092123015672.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/85183219310.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/kanigipareraxize.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/37169966149.pdfIn PDF document text
    • https://superpart.com/files/vejotepakumawuruf.pdfIn PDF document text
    • https://0955205219.jwa.tw/userfiles/files/logukurenuluzoraw.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/88046481938.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/pegegawerokopewerijunof.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/60538133598.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/selulobufimevat.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339be8d087c---24854812662.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133244130927---74976478498.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/52823950117.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021090601104680554.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210906154744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=sms+bomber+app+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_off0000d789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD789 10380 bytes
SHA-256: aaa455e4774eda718a399bcf38d764e3b6eb02eb40663e40542c8bd95cdb6b5d
font_01_sfnt_off0000eec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC8 17748 bytes
SHA-256: b72b18b948ea5309a8bf0fdc530f2155eb85d46325b11b9eff55f7116a860810
font_02_sfnt_off00011c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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