Malicious PDF — malware analysis report

Static analysis result for SHA-256 db802983b7ce15aa…

MALICIOUS

PDF

86.0 KB Created: 2021-09-01 18:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e6191dc72fb5d7a91371c13243d76abf SHA-1: 835f703b03cacb44c3ae865ae0ba6c8852a5079a SHA-256: db802983b7ce15aacdb087055cb61b9aec5d8e5de191d6f4fb28761a3d4a72a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or link-farming attack pattern. The presence of embedded URLs and the PDF structure point towards techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://scapetime.net/images/website/user/files/69025579842.pdf In PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8a6de7e39---ridaxelosadoxegabu.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/aq604rgafdvcv1qs360j6m493s/87878675845.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160827b807e1a0---46678205302.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b70f28b3ca---tudapenejusowetut.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/sukoruku.pdfIn PDF document text
    • https://sealskinz.ru/files/file/55837031833.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/78390026840.pdfIn PDF document text
    • https://ksboutlet.com/file/files/gogogosexo.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d913d107877---74768742100.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/0b8827e4b9796079475377d0298dd070/56481883262.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f372df17c4---rusobiwamodozofaj.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e74238176d---niguvepa.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/39539922696.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/vometubazakotupedi.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/zabezavixev.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/9vds58jcam1jun5kp285iqgj2r/relaxozupabotenebaware.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/tolazoge.pdfIn PDF document text
    • https://arrad.ch/modules/ck/ckfinder/userfiles/files/90975342087.pdfIn PDF document text
    • https://drsaman.com/files/xofepigurolevex.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/sebovivo.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a297c577fde---74193936991.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/tbtq2q6jukudflsnejf8eetm5f/lofowipux.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/dasukadutev.pdfIn PDF document text
    • http://ghgunclub.com/clients/f/f3/f3036db30fa8ed97f94f648fc77c1040/File/vujevewugubotezeruxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=difference+between+direct+speech+and+reported+speechPDF 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_off0000ea4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 17992 bytes
SHA-256: 37e87e24b6a1956351622b03b52ef366f73f90b0c7b9b3d2143dfc14a1c0450d
font_01_sfnt_off000118b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C8 10900 bytes
SHA-256: ebb8703fffb499736661f0cfebecd9c67d3bbf6334110d6f005a1c01a9103d3d

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