Malicious PDF — malware analysis report

Static analysis result for SHA-256 33708ac921cc869c…

MALICIOUS

PDF

59.5 KB Created: 2021-09-16 18:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7dcfe73ac5236dd10b10aeee3549c1cc SHA-1: 4781ba0fba31d77e72cd9f9e141ce9ad6abe5491 SHA-256: 33708ac921cc869c1c05bdb97e58a25822ecc7884a2ec567c7296432af9ae185
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised WordPress sites. The embedded URLs suggest a lure related to installing Flash Player, likely a pretext for a phishing or malware download attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4489

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 https://catamma.ru/uplcv?utm_term=how+to+install+flash+player+on+android PDF link annotation
    • https://dptech.vn/uploads/files/dulusiwix.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/xegamilif.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/famufar.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f075890f9d---sawexagotekigowake.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/52301968934.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/vowazaxurowiza.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/49938669909.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/65888303252.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b2bdd7cad---xusefuwaninufemefaro.pdfIn PDF document text
    • http://nguyenphat.com/public/default/ckeditor/files/tibalawitevodog.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/gukagefidadotepum.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/resezo.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/77737439190.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142b37183366---7591400983.pdfIn PDF document text
    • http://canissapiens.com/images/uploads/file/jajaxabazinesonomag.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/41698206122.pdfIn PDF document text
    • http://insightonafrica.in/userfiles/file/rojusi.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/losakadukoluvaku.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/jatamusixeg.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/bomoremegifediron.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/62886271685.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/67499095505.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/bisubuginarirabisatizuko.pdfIn PDF document text
    • http://www.nena-artspace.com/ckfinder/userfiles/files/wutudepadenap.pdfIn PDF document text
    • http://livestocktool.com/d/files/75008952138.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/pebadi.pdfIn PDF document text

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