Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c37968cab9a946f…

MALICIOUS

PDF

77.7 KB Created: 2021-10-12 04:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3e0010abd7e51a98361316326c956de0 SHA-1: bce3862bd396adc931db3d898f45ebcd261ec867 SHA-256: 1c37968cab9a946f019fc9333b1d46cec920d9ba16a100bbbf194e806bd6cb10
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 http://evaemlak.com/userfiles/file///wuxutaso.pdf In PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210905192936.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147443705195---9806618977.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/gazagi.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/fasokupovuwolovu.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/lusuwidotebezupixuzidez.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/juvosagekitatorubitujole.pdfIn PDF document text
    • https://pellevah.com/upload/files/86311261839.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/jigomamililodeluvu.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/nimusofefagezolil.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/zujowixifeg.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/ketededokazirenemeg.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/vojedumatirulufuvu.pdfIn PDF document text
    • https://zahrek.com/userfiles/file/49177511140.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/161381057e3bc2---23654490048.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/74019372286.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/giririminegile.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/zemagasafo.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/95457392105.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/45133122887.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/notarapubas.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/8ec6817870c291d1c5ae4b4a99eb802d/mumuxeneril.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/5bf248f018bbb0d3283142dce7feefde/jivusur.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/7451790103.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161641be921b49---jopigusuvakok.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/Z3ufxtS7Wvw/uplcv?utm_term=mutants+and+masterminds+3e+buildsPDF link annotation
    • 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_off0000caf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE309 16980 bytes
SHA-256: 02622c7118766a84b62b8f6a83548b1111d9c90fffcc954f28778f4c3addbd33
font_02_sfnt_off00010f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F04 10696 bytes
SHA-256: 1e25599bf2116379ecc4614d092da3f26f1c69a51ea7002904334654547fb67b

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