Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d0f1e4c77959b4…

MALICIOUS

PDF

83.6 KB Created: 2021-09-18 14:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ecd987ac95f1e660b249837e2eb1ac18 SHA-1: eba6ac642fda463389b0549e708a351b9365f698 SHA-256: 29d0f1e4c77959b41fa67b2101d55f8433611e87bed94cebb2a2673cd4bc9357
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, many of which are likely compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.findvoters.com/userfiles/file/52238327651.pdf In PDF document text
    • https://esprimagroup.com/userfiles/file/bewifewixojufebaxodalenox.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/56793345067.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/86511567131.pdfIn PDF document text
    • https://sofupingame.net/calisma2/files/uploads/kazukebawe.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/nalusoxodekijubexilekobo.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021090414163873499.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/nimalatewu.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/3b9f90831715d6bb6a7d63916ed81dad/dofonovelipuxesegun.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/2cf74bf2286dad4b0d7502c5464eaa3f/88514695948.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/menowogupuzalun.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e771c90c8---pitow.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/59685929330.pdfIn PDF document text
    • http://gr-chem.com/upload/files/zegituzajoxipexixemab.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/43559090784.pdfIn PDF document text
    • http://air-ned.com/uploads/files/pixedodasoxogili.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/xoditogigidupesikiger.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6121bef93---fuminipulufe.pdfIn PDF document text
    • http://flapboxes.custompackageboxes.com/userfiles/files/15747898515.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/fopiberivinolono.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/82477614421.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6fd4ac811---34621865246.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=kabir+singh+full+movie+download+hd+1080p+filmywap+comPDF 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_off0000d4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED01 20968 bytes
SHA-256: 945735e30ec30e1e2326d056f3088d2831f05e2646b0eb148432b429763e141f
font_02_sfnt_off000124cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CC 11848 bytes
SHA-256: a631ee1ed7aeb20423523514f131e5d59fb36a3d6117bcdb7478018a101c7b51