Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2748642c1718fe8…

MALICIOUS

PDF

84.6 KB Created: 2021-07-25 14:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7102b014a81ab6edc3d5f8e2fe4c82da SHA-1: dad1ace29ca87109c814cf5f41c289518c57e5d3 SHA-256: a2748642c1718fe8bfec553c77685e2f3679aa1197bae7077d95784f505b32c9
154 Risk Score

Malware Insights

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

This PDF file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be directing users to potentially malicious content hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5610

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://canadanur.com/resimler/files/kasul.pdf In PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/rfg4mpd0blm51bo22u2ma8phfk/38762140533.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e84fcfd00dc---musukekexudidelazemuvezo.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/82664439698.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/d22e7e8c172c1cf686ec715d66d5699e/dupolavomowu.pdfIn PDF document text
    • http://passaicvalleyclassof1957.com/clients/44362/File/nezoji.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d709ee086---80498316605.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/d714de9afc59c3f379ac723bbef2de68/86956195202.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608397d733c70---93921469297.pdfIn PDF document text
    • http://vralumni.com/clients/7/71/71e0d721b250bdad3664bf54e70089ab/File/fiwowakinubeneno.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/sakusazozibareribukat.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/62337775032.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/40125944822.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/aa9f5b3e5294eb5237e031443be4d9db/19244544181.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/tovinoritegivido.pdfIn PDF document text
    • http://belst.by/upload/file/17756613193.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f9cac034dcc---zakekilokotefoxodurotujix.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/61243517891.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a378384f704---81850670556.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/kegijenopimapogewul.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d96d4a45f8e---mosafupozilotowexos.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607683399f77a---linej.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/pewogakekoze.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/mojbrg6rh3haotpql7f1el0afe/23039012149.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/cad522e9b7622ceb32843b556160a80c/88752950153.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e1947ae784e8c40fc7b6d419bf783e88/resawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+find+my+roku+3+remotePDF 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_off000102bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BB 17664 bytes
SHA-256: 7f23ad8e4c29551f370dbed420a977c33c70393609a4691fd695f3405da791c0
font_01_sfnt_off000130da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DA 10692 bytes
SHA-256: 4736a413e8fa79f300d7d1946760e577eb364615339d09f4cf248974edce6ff4