Malicious PDF — malware analysis report

Static analysis result for SHA-256 134f164cfc800d4c…

MALICIOUS

PDF

79.7 KB Created: 2021-07-28 00:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1038b7e49ff14138be10f5e7d40f24ac SHA-1: d91cdb011ba19db0557d73a511adba731ebeded9 SHA-256: 134f164cfc800d4c88406982c396306a7755420261c36787ec93ebee4c09be66
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS upload directories. This behavior is indicative of a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

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://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/dljfem0f9m550d0qlmfrh87ubb/daninujo.pdf In PDF document text
    • http://palestraarkadia.it/userfiles/files/13716384557.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/6np27u4v9g6iqrat3fei1ohcae/56780688488.pdfIn PDF document text
    • https://hoavily.com/uploads/files/38282862037.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/nosarutejusixedumum.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/ditasoluxoxuvabegebum.pdfIn PDF document text
    • http://digifast.cz/userfiles/suwesigufimenapala.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/9f252f852ee18c41e3a9d4e05c2fb9a8/46607791824.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607da636de80a---vigafosotepokimowasa.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c785a56f2---sazuregarodavej.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/25779048312.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/belopapuvanozuguw.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fb4452366---nunugafa.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/todrolf4cvpu13lq164gtmuu9a/48485590737.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/xipodofefono.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/vofapelewogobofoladasowu.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/xubirogitobibuvorakina.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/25058453165.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081bfe222a5f---sotomirukilomuke.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/zudizomesefupojatajos.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16087380aa1962---22053451443.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608992772a81a---gesew.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cff97a0a9dc---23315963483.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+use+popcorn+time+on+android+tvPDF 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_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 17480 bytes
SHA-256: a96305e2e5589e8f31031ec3ce94e699d43310b8f6b3f5ef2f0d81f9c254dff8
font_01_sfnt_off00012489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12489 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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