Malicious PDF — malware analysis report

Static analysis result for SHA-256 c898ce731e066ee9…

MALICIOUS

PDF

76.1 KB Created: 2021-09-02 18:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 26f295e3a4688387cde61b3129f3f854 SHA-1: a2e7718aa070d3a9199ba50710f93672667bed88 SHA-256: c898ce731e066ee9a1ac25b112faa72e7202a8e60e658073df9244a8c6212c98
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection and heuristic firings indicate this PDF is designed to lure users to malicious or compromised external resources, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3768

Heuristics 5

  • 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
  • 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://huntic.ru/uplcv?utm_term=icom+v8000+manual PDF link annotation
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63086e6b4a---25003384380.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/ruvomelunebisodegepuneg.pdfIn PDF document text
    • https://topjobsnepal.com/ckfinder/userfiles/files/22160108009.pdfIn PDF document text
    • http://dges.in/userfiles/file/zodafuja.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/513i5ag1gv1mg9j91pej9uv2g0/31709757810.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/33832356176.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/rozekoxo.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607272b8a7d86---7854668850.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86e5ac0009---voragutufapewufojoxafi.pdfIn PDF document text
    • https://rajatotogroup4.com/contents//files/44023707140.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/5kh6s84jnvgi4vtjppb4h1tm11/toduboxejeminilu.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/retipupunamigaxulavufede.pdfIn PDF document text
    • http://k1a.ru/images/files/file/lifozawulijifoxivi.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b29062124---66886782480.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897b1575899---jizekuxuwakegexitibe.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/koluvise.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/zadaweded.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/sojeb.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddb0904d9f---95140174257.pdfIn PDF document text
    • http://yuha.be/_files/file/takupamitiwuwapil.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/sabuwezapumarosetuvijup.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/88020947015.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/14461523238.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/monakifi.pdfIn 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_off0000d97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97E 16504 bytes
SHA-256: 1ff769982e9649f162e5f3db3a456d8ce60fecf758d0d5078956db06117e375e
font_01_sfnt_off000103d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEE 10248 bytes
SHA-256: 6df756e624aaaa5a371f1d64fd7b5b1af9b370079c68e6e121d0d0015a678145