Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a16a6d73eb03dd1…

MALICIOUS

PDF

87.3 KB Created: 2021-07-07 19:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: fd314b8907720a02600a3a0c2ba55794 SHA-1: f207a14c3168622671c097f4481bb134453843a6 SHA-256: 3a16a6d73eb03dd1d211331da38cfd882c06d280b9d644cc57197375ebfac18d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2835

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/jitepej.pdf In PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/72544182733.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/vae4e4a0ah2i1vbdpngd5pb7t0/vivatekoviwif.pdfIn PDF document text
    • http://winso.tw/userfiles/file/24417634815.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/koxeses.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082398943223---paganikepuvalaguva.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/68011290368.pdfIn PDF document text
    • https://chptravel.ir/data/file/70648158535.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/7bbba003d5fc80e99a69df658c3391af/96016107424.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8dfcda8d3---wumuvinixizodujem.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fanabubemovabosi.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f8ab86a2d---wivejajaneminuxa.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/38387260554.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/53692098771.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/fapufet.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/94096894486.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/14061878198.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/kefavo.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/fogofupiboba.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/46978156975.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/aabe6c7da092d9cd29c3c9fd57835aeb/zajawulipalur.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b22e3dce4---37529056691.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b540eccebff---50916412284.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/c4c9e6aaac8ac98e31ec762b08f35ac0/vubitelomimurojikedasor.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b39f24001---3921647962.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160959232b7817---62485358940.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=buster+crabbe+frogmanPDF link annotation
    • 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_off000115bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCC 17728 bytes
SHA-256: add82a118176a96e70f90578e665889c828bcd0a30eef739c0b3923c4eb53dcb
font_02_sfnt_off000148ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EC 10836 bytes
SHA-256: 5b194f0791dd5f3c5479917022fa1d9cd3990ed61c539e755d40e32a93dc585d