Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69b14596b55de5a…

MALICIOUS

PDF

78.4 KB Created: 2021-09-15 17:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 72cbab5edda0c9739f0ed3f9ccc27a69 SHA-1: 7512c54422c07628d9008fba5097120b80db74d9 SHA-256: b69b14596b55de5a431b7b7e4a65c81aa27e5b2ae8bce307f1ed6dfd2ded5c6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF structure and embedded content are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://smidgel.ru/uplcv?utm_term=100+level+default+deathrun+2 PDF link annotation
    • http://palazzodiaz.com/userfiles/files/53859736278.pdfIn PDF document text
    • https://deepex.hu/hirek/files/41399291748.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/79088510270.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/45983940810.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/gukajijamoxitinesi.pdfIn PDF document text
    • https://jagamimpi.org/contents/files/82864024896.pdfIn PDF document text
    • https://toocapen.com/files/22475464396.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/dajapowopuvexuxebavavedi.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/joboruribuzezefi.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/17160329635.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/a2e2q1e70a4licfjeuh0riaa2e/48686365428.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/82579869970.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/pozanamol.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210911155100.pdfIn PDF document text
    • https://menu2uplus.com/images/file/32293281555.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///65057401757.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/72bf976aa96eddd055bc51e80bd82605/42411555477.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/qpsp8m6uvspqbtrkn1b63dbkd5/99744909710.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385927d1426---govimubadira.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/40935332272.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16137057b4bffc---6057795607.pdfIn PDF document text
    • http://xn--hazrdner-r4a10d.com/alisveris/yollanan_resimler/file/sikexa.pdfIn PDF document text
    • http://kd-council.com/upfile/files/20066967067.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/46298245348.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_off0000d25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25F 16276 bytes
SHA-256: 808dfc03b6c886b4f86d659f2516d4e2b73dfb00972d339fd164bea90126c756
font_01_sfnt_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AA 10436 bytes
SHA-256: 14fcbfef370f7089bdcf85be756a59d4758a0f7eb9d8a2f4a4840d6a3068cd65

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