Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35d00dde0b0736a…

MALICIOUS

PDF

62.1 KB Created: 2021-09-02 14:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 2b27f06073ee06641cb06ee3ec0c8272 SHA-1: 87f4cbb9b055f83cad78cf2228ae01da761bf436 SHA-256: b35d00dde0b0736adb393e32f35548a2d6cb03451836e0bd52da9cca1fbc2081
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9121

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 http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa84411bf86---46647597665.pdf In PDF document text
    • http://noahjohnsonsark.com/clients/e/ef/ef24418f2336b9480f3353ee42fa3f58/File/8248009764.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa7e5bcccd---41148876854.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c68e45f2a3f---79057638275.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/murumijabunoworixat.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/35402547729.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ce69d8dbd---xizepojijisolebuvaxaji.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/17210375954.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3474cb511---vijonez.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c0803ec10---14772815723.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/aeac194bbe5302cf00de194d2c85b1bd/pokogugofenobazed.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/nawukelaminejanefetowawow.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/selodatumevenalezede.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791bdeb0648---82233719785.pdfIn PDF document text
    • http://thietbianninh188.com/uploads/files/78348354628.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/losufozuponegenezosotowi.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210818091718.pdfIn PDF document text
    • http://congtyvima.com/images/Download/16556480696.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/pezamimidamimosunabipago.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/16474012266.pdfIn PDF document text
    • http://geodez.com/pliki/file/80910606831.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088c4bc0bdb1---39776572606.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/xodavubusite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=parkinsonism+and+anaesthesia+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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