Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7797aba1cb8ec9e…

MALICIOUS

PDF

85.1 KB Created: 2021-08-04 09:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f526569e25d6a6ec65a2bad2b5d8e6d3 SHA-1: e7660808b43ab586a2a7727b5b0911cac0a48bf6 SHA-256: c7797aba1cb8ec9ea712f8ffff89d36611ec0245044e5d5de3ff190f35f54e69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cructi.ru/uplcv?utm_term=commercial+lease+transfer+agreement+sample PDF link annotation
    • http://fitviewer.de/files/file/18663833929.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/ziwetupeguxowu.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/78047196065.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/3b2acf35b571fc768cd890e8fe1023f2/6657634562.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b9a38982e435ad72d73ef8b0758125bf/xenenafakakajetozexaj.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/roziku.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc81759923---pazuvakatubosoje.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/vulunegededavavajusuv.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/1974905980.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606f08e06f08b---33788664098.pdfIn PDF document text
    • http://thebellingerfamily.com/clients/0/05/05034faaa501c69409a7459485cba135/File/92214459463.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a305993ccb---93297334818.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/9amaegs47dmsts8n8kj5rtfaek/jivetedobonud.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/14535078771.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/23a620122c539df2d6343469ee8b962a/gukonivojabilulifipivakem.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f43cf12d11---97953887424.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/552aac17bc18aee1c5c919b7015fd5e1/juromifanepojiveled.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074b8238644e---majetujalifagozaworo.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/mogubuzefirodamodevodur.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/2d574ecf906ef52208adca7ddb9f2509/pasogedaju.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160f2467b41ab1---rapigirebamanupikeg.pdfIn PDF document text
    • https://lecapsuledigian.it/file/74519431093.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160875c350e95e---46160049696.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/2022454033.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_off0000e8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D0 10852 bytes
SHA-256: 30e9fc525e85a0a341d38963d9e5699ad8d9f9b4b366f3b05b25cf902bbd2bcf
font_01_sfnt_off000101e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F7 17220 bytes
SHA-256: 743a016cb36f4e9152246d6177ec422e66e2d2c88e39a51e61f1af867f623c57

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