Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb17d946fc7cfc47…

MALICIOUS

PDF

79.5 KB Created: 2021-09-06 18:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a092a16c3e2cf4226941f1596a3b466c SHA-1: dae023a3fcdc42d4d103a3d59e352507737a3247 SHA-256: eb17d946fc7cfc47b7f7f2fb7045c983451a74b03ed8f6addcf58affd02c702e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several heuristics indicating it functions as a link farm, including links to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and the nature of the links point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://autopratichesas.it/file/geburej.pdf In PDF document text
    • https://people11people.gr/uploads/File/rafulirovi.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f54da6956d---vuxiluredipomezoz.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098304465483---boxepim.pdfIn PDF document text
    • http://strahyi.ru/images/file/66486169180.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/86820696710.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/5557914120.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/aab78a9f72137b4d8d2fc0ea6c68e076/dabedazofesuviziwavevure.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9e9ba1344---bojamomoxurijubufinajerod.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/dokoviwaveburoripiwa.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/kmu3dd3d0idnh0cm09u3rhka9d/jujetemularux.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/l6e2qlk415pevr6hl959qba3kv/xabikufezoriru.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/62344183569.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c2562ea23e9ca809edf6c1b5b40fa843/96776873549.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/berobexekiwukuwilejox.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/27588809184.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/98508131650.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/53696904015.pdfIn PDF document text
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/gawosudapadubekurevolase.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/4479941555.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/33276820255.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/bilpgcj8ottda09435bldugtm7/ruvezok.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/75168949570.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/95199679659.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/35844035114.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=kia+spectra+2002+owners+manual+pdfPDF 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_off0000cff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF0 17708 bytes
SHA-256: b048bb9c5aecddc867cc85885bc2873b00f73b045a257ed585f5111cb710b596
font_01_sfnt_off0000fe1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1E 11200 bytes
SHA-256: 8226813b22ae045391084bd47604dbca65347e9db7663769b28c4534c833c6ef
font_02_sfnt_off0001186b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1