Malicious PDF — malware analysis report

Static analysis result for SHA-256 979ec09e3929198e…

MALICIOUS

PDF

92.9 KB Created: 2021-07-17 23:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8661e81e65171ea6203e9f4973c3f336 SHA-1: f402da3b4aa089fee0693b0103980707e543247e SHA-256: 979ec09e3929198ef7751beff35c62593b9df9a37fc1bb5559b6678fa8843982
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised WordPress upload directories, indicating a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The embedded URLs are designed to lure users to download malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3186

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://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/39h3aj5fdvidc84l70eoqdtdt5/63277997537.pdf In PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d698deef33---32699120483.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/24544977311.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/be8d25765fb23272d6f87e3357397928/60786939249.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/wuboto.pdfIn PDF document text
    • http://patroha.hu/file/pemeponigekarivupunipaj.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/1e60c286e9bdaad174d74ba8e698f94a/58285910913.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/1a5b209770e3ca33fbdc75df30dae300/44252599659.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/fizejizixaxajolovuwor.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/94263534917.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/81237987676.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/jesomaridisererejasepo.pdfIn PDF document text
    • http://zgic.ru/!upload/files/lezosareja.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/5cnifn34fg7gthhchqu8namir6/bogojetefero.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/ilnf5j3ebsgtcp7rej49dpkko3/21139117535.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/39f2bb365fca3dfdae38d05988fbc642/sisolifovulemabuku.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/navulemalakovixexa.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/zuvawijuzixazes.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca955f2eda---24153400909.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/59652010080.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/38583842232.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609987f601bf2---figimik.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/7009145538.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=first+counter+strike+tournamentPDF 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_off000116c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C6 10512 bytes
SHA-256: bb2c7f45f46f957454741db121c0ff1af96433693d47629205194c6a87449fb7
font_01_sfnt_off00012eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB9 17984 bytes
SHA-256: 381d0131cde724d365b44ade7b762d0805703e3a7ef25e5d536ffcbf228df926
font_02_sfnt_off00015db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1