Malicious PDF — malware analysis report

Static analysis result for SHA-256 7796b0a1f64b1dfe…

MALICIOUS

PDF

102.1 KB Created: 2021-07-01 15:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b92bff0848a3296206b92ef04cf9358d SHA-1: 3ea6e27c17bf087e2291aad0937692f969fb286b SHA-256: 7796b0a1f64b1dfeb56580908f884e38cb82304ac65818a0057579a08c92a095
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous potentially compromised websites, which is a common tactic for phishing or malware distribution. The presence of multiple 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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 http://roxburyhs1987.com/clients/63080/File/62939522786.pdf
    • http://francisfamilyreunion.net/clients/870293/File/9061277722.pdf
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/34117125266.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/e759bbedd7add1ca846c90d511ce1e06/10874735188.pdf
    • http://www.heksan.com.pl/file/gajupotaziga.pdf
    • https://aparcaderoshaddaichile.cl/uploads/images/files/33450390292.pdf
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/75354938730.pdf
    • http://huron81reunion.com/clients/f/fe/feec28e48c841af8be4ad6373737a022/File/87850209766.pdf
    • http://bukharaatlanta.com/sites/default/files/file/8986634923.pdf
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/bb072bd35cc36445e9404c0b91f6c501/96966384130.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f94adc2da2---22879426828.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/f4ccc9a673886c26a7d7cad06da8e12d/lujanozelol.pdf
    • http://zonwering-belgie.com/ckfinder/userfiles/files/28840147715.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/f33bdee503b2e8801fa4937519b4f858/fuvutuworogibilifitolerov.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e94b573827---66448309303.pdf
    • http://slhs1958.com/clients/18590/File/65661689677.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc5c20ff7c---42906976231.pdf
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/16720367817.pdf
    • http://netinflux.net/userfiles/file/wepisopuxegip.pdf
    • http://www.tomasjelinek.com/img/pub/file/73324287578.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608668fedb961---28553279267.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729b770dae6---bifonemunefilixafevaxola.pdf
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60331728773.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/qgmm2dfcddmo84d1olso7v0j34/2832687087.pdf
    • https://wecareprogram.org/images/file/57563353661.pdf
    • http://happyhanool.com/ckupload/files/limololure.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608119ebca3ce---kezoxakagesokukadif.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=golden+state+city
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c38.bin
2d0b5c028ab86b8c25cc267bb5677b8c2f9a0535f31994e3543a42dae61f4126
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C38 10416 bytes
font_01_sfnt_off00014400.bin
14027fa8957d72a89f0672f814a6afd1eaf642f9abb8b6900300128882f77e2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x14400 18276 bytes
font_02_sfnt_off000172e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x172E8 16792 bytes