Malicious PDF — malware analysis report

Static analysis result for SHA-256 14193f1f1cee3360…

MALICIOUS

PDF

82.6 KB Created: 2021-08-25 04:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 2750ba497fd78235b543e7df7a93b74d SHA-1: 253d088fd88294f9f4ada855dca745c168d92321 SHA-256: 14193f1f1cee3360eb1687d0fa7a281bf1662e107e000494fc893c94b7ca331d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://infrive.ru/uplcv?utm_term=online+electricity+meter+reading PDF link annotation
    • http://webinaris.org/ckfinder/userfiles/publics/files/lixigaxujufun.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c68cb878b4f---11912091642.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/53537993874.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/galetixemumapusizivubu.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf4d3b6af3---pexofebireje.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/20688518342.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/biguwejelile.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905d60d4c1d---firowumulakogojeluzogerux.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/37371953296.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/67442df499f6a0d5fcf13c7d1c5fcad6/82162323439.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/58052586054.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/patikexuronijaxotosetefa.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9f210326d---54398467415.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a5fe4e94e---7545932452.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611d4240136be---koluvodebuxalid.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/90238427080.pdfIn PDF document text
    • http://hainfelderteich.at/surelezepapazapukaxituta.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/b2ce237fd2721d1f35f876922f502176/zopitibigevoxipewad.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/60861336201.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/22764492700.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1809012d0---54705409148.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/67044807520.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b9756e2cbd9---josunowebigipigoxaxixub.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_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B7 10564 bytes
SHA-256: 328998779265e7660d98b7ff2b656e454fd562541fc3e02f7bf588a54ffb4c06
font_02_sfnt_off0001119e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119E 16652 bytes
SHA-256: b9abe571c9f7fb633d80d329c75fcb7ff4e194b5827e4bb06f96856eee8d89d1

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