Malicious PDF — malware analysis report

Static analysis result for SHA-256 60177fc67c7aa29e…

MALICIOUS

PDF

84.3 KB Created: 2021-07-02 15:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cb5862dc1da56237afa7f6c57be8ea6a SHA-1: 0f496ac83d1eed6519ea3aca94bbe111af6fca50 SHA-256: 60177fc67c7aa29e46054af42d669036942d6c76ce7c1ebbfcdd8457d59f4baf
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm, with many distinct hosts and URLs, some pointing to compromised CMS uploads. The ML classifier and ClamAV also identified it as malicious, likely phishing-related. The document body is unreadable, but the presence of numerous external links suggests an attempt to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://cambodiadriverservice.com/userfiles/file/jevawibidejulor.pdf In PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/d10e1fe938470071d2798c020ac56d0e/kalupixixajazude.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609835ec70682---vejamatugebegozuzopatebag.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cf729feec---gipamatotapigujeloregaraj.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/l2se6buk4bich9fa7jgsv5t484/bejoximezefodomasesawe.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/25144399496.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/44850231632.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b1d25d56be1d4f7b1e3594d0a9a716f5/93263920619.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/db650198c2eb909dcad950bedce502ff/dakos.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7c7b576e5---fosawelovumov.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/wesadimoxozepoxekop.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/vesamutamurobarunum.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/8bf0895a2e57ee9e73060b4748082caa/koxagu.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/webapixasabidilakef.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/gilunaxubiwalazelok.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16077d6e8569e5---tepoxegofinuvos.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/b662bc77a40b721a475a88a1e66d8592/dovuxetudiralakugulesif.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/628663775203d8936df81f48ed284c1d/fewoxarapokoba.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/bf28ccf8da9e204d3b63dad72a6e986b/forejusun.pdfIn PDF document text
    • http://zlato-invest.cz/upload/files/viserigojatux.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16078f88d5ee00---veguvu.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/af7800a3084a2516e6e0c12722d796a5/99156029017.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=pain+swallowing+after+endoscopyPDF 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_off0000e4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 16936 bytes
SHA-256: e7271b8ee0c33d071fa16ee9394b6ca4c79889a82a53136b1bac849e8c72bf04
font_01_sfnt_off000110ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AB 10996 bytes
SHA-256: 4aa05d3c8f9f1f952d12a5e4404cd57a3fd70efc0f46d94f1a46c5a097e8f95f
font_02_sfnt_off00012a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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