Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e52ab69145fd00…

MALICIOUS

PDF

79.8 KB Created: 2021-08-31 20:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 160f5fd27df0df949fe15b6dacf542c7 SHA-1: ddb96359bdef091ad2285de264ddf7798edb0d0e SHA-256: a3e52ab69145fd0012ecd68c6482a4a6997ae4a98991b40c0acb5118d95db720
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://eiffelflowersquesnel.com/userfiles/file/90566286519.pdf In PDF document text
    • http://smn69.com/clients/866038/File/gagomad.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/sokumukejozit.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/piresisufapakixadediwo.pdfIn PDF document text
    • http://netflor.pl/upload/File/58258892507.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/e8da65f0e8335d463b1f1e5318e55db2/lisafepujeramapedetapex.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/belokarakexumut.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/22c850b11c75edbc250577ca1cb64969/vidulafojovixebixit.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/penupewululivi.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160736c0bcd5a3---deremipodaxanago.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b58a8b1f409---13623838710.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/reworujoludu.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/jasuxasewubajiteg.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/40041690909.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/bubizoselo.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/rixaton.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/paganifozujepugol.pdfIn PDF document text
    • http://yongchengtech.com/uploads//files/202108110607197474.pdfIn PDF document text
    • http://ymmicro.com/files/files/wopamolezefugamipisake.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/64358025975.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/1046988023.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd70c49889e---vurutu.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/bopapituderukaniniro.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5077e5c5a4---xumizewejutezegatuxom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=can+i+cook+chicken+then+freeze+itPDF 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_off0000d4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DD 10400 bytes
SHA-256: c7cffb989befd70514061e23c57a9832957f67cb150d9f11c6932749af9854e6
font_01_sfnt_off0000ec6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10480 17340 bytes
SHA-256: a8742e025180737afccf0c9d1e1eb7b7b3170f67cbf4223ecf17112dcb3807b6

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