Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94c8cf379736664…

MALICIOUS

PDF

63.7 KB Created: 2021-09-26 19:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c6d104b3d285186abf6062adc74b53ba SHA-1: 0402842c11b5ed186152375f2c4e921b3e5b7ffa SHA-256: f94c8cf379736664cdc4f7d5e54f02d0236c81a6837145df2ca5906435f531f6
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm with numerous external URLs, several of which point to compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and link farm heuristics strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7061

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 http://natalieshuff.com/uploads/file/46200276256.pdf In PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/58707075679.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/14146445546.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/refiropesovadupitotalo.pdfIn PDF document text
    • http://underbutter.cz/download/foto/mewudale.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/42556704975.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/83490891860.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/22416846094.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81561600133.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/34775959950.pdfIn PDF document text
    • https://vientangluc.com/upload/files/23486309182.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/zuzuxilesarapinu.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210912191959557.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16144219b5691c---vijubigozir.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/nfo5nl4irf8c8nva4hm1lqe7m4/jitoji.pdfIn PDF document text
    • http://allefrgycg.news-read.com/upload/files/mowidikupuj.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/nufifomadobud.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139719f8b2e3---fowofor.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/zeximezumalibaju.pdfIn PDF document text
    • http://vhktn.at/images/content/files/73048877068.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/efe243941a416c0a9b5c4412fcb4120e/90400127263.pdfIn PDF document text
    • http://aweibel.com/Photo/file/89366691427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=super+bluetooth+hack+1.8PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB140 15424 bytes
SHA-256: 295e90b2d1900ec7565e80d0ce99914540e2ea880f7ef5d6f196979be4b3db0b
font_01_sfnt_off0000d830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD830 10840 bytes
SHA-256: 308e78ac4539154532128810fd49ea3b021285cd8732d1c3c9fc5d74021ea872

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