Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9bb0103fc66e6a…

MALICIOUS

PDF

84.7 KB Created: 2021-07-01 14:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b8b2a8f34098a23b8d1e45649c0e2264 SHA-1: cd61301ac6126a892754e64f3fab1bdb56dd5b33 SHA-256: 0b9bb0103fc66e6afc814a3ad362cee5171171663c4ec95ad78910b8e8df3997
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript, though not directly executable in this PDF context, indicates potential for malicious scripting if the document were to be converted or if the links lead to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://allytemp.ru/uplcv?utm_term=one+closed+syllable PDF link annotation
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/c708b55e95003bb6869dd2f7c3438f97/58454691572.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/nodaxaboriw.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/37121568927.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/28805edef64f837d709ae0e7ca614471/sezawowivonupizak.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/7c94e0ee780cf8e0490018ce6c8753bb/39321870790.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16080972826b08---feguxomix.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/8vlu48b5nlr83oeppq5esh75b1/75253322179.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1451c0f31---37313923622.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/hn10f7a2ov4ql3fm9a3nvldbus/fekavu.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/56605993814.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/8f2ea901afcaaec8b3b7b8e827debcb6/52538375829.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/5f1f4b5f07109a64667134ede1c9c776/2907507026.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b147a0484f4---61166246664.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/f5300459cecc2df5fed6892f5c944e40/66237657176.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/jabasarikexemadixok.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/wazukupifidefodopodediv.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071b686a493f---petegamirawat.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/f6ee482bac9832c29adc78800a28197e/92670418527.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/21278977630.pdfIn PDF document text
    • https://termoformat.md/img/files/84623406271.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/rosop.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210620_155008.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/df60506a63f172fd7990d1fe59b79b39/93884351050.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/42186237980.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_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 10352 bytes
SHA-256: 85beddd615e2bb385cbbbae78bee7acc43844f731c378c93773b5140640572ec
font_02_sfnt_off000119c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C5 16940 bytes
SHA-256: 6ddfd2a0a0b07388ae98c2c22efccdc3533f7c0af8ba658e27329cd79f59b622

Open this report in the interactive analyzer, or submit your own file for analysis.