Malicious PDF — malware analysis report

Static analysis result for SHA-256 d75b2052e44ebb90…

MALICIOUS

PDF

83.5 KB Created: 2021-08-26 03:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: cf92a4290cc7d89ac34e8bd59c30c8e3 SHA-1: f5c1639eb8b8118ee6971c5d234c5f8ab8eb00ab SHA-256: d75b2052e44ebb906c775a338a6eeb31499215d24eb4b1b09efd0d5a3cf91c5d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document is classified as malicious and exhibits characteristics of a credential harvesting lure, specifically targeting MFA or one-time codes. The document contains numerous links to external sites, many of which are hosted on compromised or disposable domains, suggesting an attempt to distribute malicious content or redirect users to phishing pages. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://jandenzobv.com/image_uploads/file/58511648324.pdf In PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/36723239486.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d12d95d92c---64017876632.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/lujupibikodufid.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/masetow.pdfIn PDF document text
    • https://ecoretras.com/file/gasivubekenuve.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/3e949f8df6e19aeca067ea674ae521f3/vujulakobivi.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd8d64efb4---14727285236.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/20342160052.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/jeduvavozenufumodomijem.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/12923313391.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16070650de8638---44831450250.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210724111830_v61g5i.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/du59emmgehnuf29f2guog38p64/74703824530.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a29282083e2---37320591572.pdfIn PDF document text
    • https://eternalbliss.net/file/97192193061.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/7eab946c1be26e85b06e24ea79a86b22/1188423206.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/towar.pdfIn PDF document text
    • http://alcantara.cz/data/file/29201016255.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/lpqmvhh4236jmi0q6u38hjhbhr/68899542088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=card+number+and+security+code+generatorPDF 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_off0000e29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29A 11052 bytes
SHA-256: 0bc76ea3a27200761bd81829c4eb0c4db1910a42699128086dc04145e091d2d3
font_01_sfnt_off0000fc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001143b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143B 17008 bytes
SHA-256: 0d02a2fd02faef47bb61d22d861b2189739c36da807ee164c6f5f793258ab4b2

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