Malicious PDF — malware analysis report

Static analysis result for SHA-256 24007c7df16cd3c7…

MALICIOUS

PDF

81.7 KB Created: 2021-09-06 08:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 666fb6be6f279fb0a85bfc52d3a87312 SHA-1: b1b295fe8181dc75bbf71321821852b95f0c6920 SHA-256: 24007c7df16cd3c77f76b83878f27030875fc1ccc48e33827f29728defee46a4
184 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/uplcv?utm_term=bosch+oven+nz+manual PDF link annotation
    • http://wjvanderheidedienstverlening.nl/uploads/file/zezefexiwo.pdfIn PDF document text
    • https://nistd.in/userfiles/file/minajedukikuxafujovepoz.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/gopenikusuku.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/bowale.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/b7uis9bnhnre64p7qa0nv8jjrt/30588153372.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/18463968962.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/94674122672.pdfPDF link annotation
    • http://mawaevents.com/uploads/file/59690944704.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/1s1a033nbsc1d8h0o7p1okmao3/95248367511.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/n6r90i2836od3pru82t223e9b6/wenorita.pdfIn PDF document text
    • http://aps-mes.com/files/file/34657631917.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/69128312943.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/30637001132.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/kjvh7qsd1tu8dcarcp9lrpjfri/7263030061.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a362791f8ba---40680489297.pdfIn PDF document text
    • http://bethanybaptistcolumbus.org/clients/75549/File/wumododakizixi.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/vepagupugikivurawo.pdfIn PDF document text
    • http://learningkey.org/userfiles/59300121251.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/pebewolaxov.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/69719584945.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/eef8603a9355e20edefdb44bfaccddbc/80915064861.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/18523162354.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/birubibu.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/330585194.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bbd95f349d---38015787634.pdfIn PDF document text
    • 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_off0000da0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0D 18456 bytes
SHA-256: b924e19331ed733f1786b25d170ff62af79b8070e4ad2fb0570dd3f578244ff5
font_01_sfnt_off000109c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C8 10484 bytes
SHA-256: e15fdcd06585588a4fc6d8b746cf58bd69b18a8e8e34c97d17e4c6fe4655b8d6
font_02_sfnt_off00012186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12186 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1