Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a6b5791dfd2b88…

MALICIOUS

PDF

82.0 KB Created: 2021-09-21 04:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0b73727cd79ff586f6bddea7435df961 SHA-1: 8fc5a4dafcd4467ea41936e8203b857507c02ffa SHA-256: 46a6b5791dfd2b88a7befe98dd48a4facb364f17220c4c07d06f03dd047f2c69
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ClamAV detection and heuristic firings strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier clean score 0.2133

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
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://visualmotion.nl/uploads/file/garilujoxovefizuwix.pdf In PDF document text
    • http://montagnobozzone.it/userfiles/files/93710771636.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/jexiwomowo.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/fugejowawekopulukikusawu.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/migoginezulifobajo.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/vewegokut.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/38423446646.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/86294262800.pdfIn PDF document text
    • http://hotelrealerimini.it/userfiles/files/seruwoje.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/52229954482.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/46084108358.pdfIn PDF document text
    • https://meritumptt.pl/dokumenty/file/suvaxuzu.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/737ea7763a877a6c0ff91cf1a698353d/95072967104.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/rukogozufinurugupikufa.pdfIn PDF document text
    • http://bekescsaba.varosom.hu/userfiles/files/zubijubomarakix.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/vozubejiwononeximimuv.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a87fc6f8e---17240527106.pdfIn PDF document text
    • http://malerbetrieb-malanders.de/Webseite/pics/fotos/1/file/86709442767.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/foninakesabenamuwe.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/42313081712.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16135c252b189a---82752469279.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/gudawutijuluxafawili.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/79937495314.pdfIn PDF document text
    • https://fototipia.hu/files/files/nirijerob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=android+box+power+off+appPDF 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_off0000e874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE874 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10086 18056 bytes
SHA-256: 77ee2e7ef263bb16a661c2ece87cfa373ef617bed2e21d55e1ca7d44109d22b7
font_02_sfnt_off00012f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F72 10488 bytes
SHA-256: 882f9d975468f593ca70a9943c043cb92fb2ba015fa8814f129f7de45da8e2b8

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