Malicious PDF — malware analysis report

Static analysis result for SHA-256 223188e1d8464b96…

MALICIOUS

PDF

77.0 KB Created: 2021-06-28 11:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9f8db2f1960554940c8cb7891ce062b6 SHA-1: 06bf9c6c900c35209fe9e3c35393c8e609e11460 SHA-256: 223188e1d8464b9609324b1f2df79960e4f2f989543e042ef5e6978dfda93584
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/jlf7knooto4uh3m8log6vbisig/17345851334.pdf In PDF document text
    • http://allasclub.com/campannas/file/vajixurasinupemug.pdfIn PDF document text
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/simamubusisesazoxe.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/89573444801.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/66817512725.pdfIn PDF document text
    • https://stopserv.ru/files/file/65487123211.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1728bdcf6---rajibuwavisari.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/virikidefajuwuxofer.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/womadavemov.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/86016002778.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/hphmtl3u5dog6ats2b7banc0um/xetaga.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/vexibixukobadipuwe.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/71395793015.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e69b5d3c21---timuvan.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/922795de739545bf4d90ee251a97d7e6/piburipolotozol.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb19a44fdab---togonevegimu.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/149iem32bv5al6clpc9oorph05/98999071765.pdfIn PDF document text
    • https://etadelloro.it/images/file/retemidejumuzikojomopatef.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/8633bbb7d880742c73097482f8dc0d4e/57215056196.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/gizumulivesidujudo.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/21494809368.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/45908684719.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/vuvepopalaxiza.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076303a40192---43351277704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=some+knowledge+questions+and+answersPDF 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_off0000e7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 16564 bytes
SHA-256: a897e3e505c515f4e701ec55222dec9c7ac07a5c238805d1717b4be2e52fdf8a
font_01_sfnt_off000112c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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