Malicious PDF — malware analysis report

Static analysis result for SHA-256 846a0936e52e2753…

MALICIOUS

PDF

72.1 KB Created: 2021-10-09 12:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7f1c8c92c59d305f9ebdc9142239c48b SHA-1: 7360daf42166c4be1a9de79595f0336984a5520f SHA-256: 846a0936e52e2753894eb9e8a2fd995376634f83239bdb3e02920eb47edbaf01
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and exhibits characteristics of a link farm, hosting numerous external URLs on disposable domains. One of the primary URLs, 'https://allytemp.ru/uplcv?utm_term=meaning+of+lily+livered', is directly embedded, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded URIs strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3549

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://allytemp.ru/uplcv?utm_term=meaning+of+lily+livered PDF link annotation
    • https://giriconsultancy.com/content_files/files/burutir.pdfIn PDF document text
    • https://777mto.com/contents/files/38833239409.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/18976313879.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/83459805593.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/84422280603.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/gevovepujosesaxosi.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/18367500387.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/defezufafo.pdfIn PDF document text
    • https://khanoomhoteli.com/basefile/khanoomhotelicom/files/4676350834.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/23820980323.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/54066562313.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/zotatezebe.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/ribuwozogeribebotuwola.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/c96c602da4c751200c0e5bbb039c4add/79023618671.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/zerisagosapur.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/9065b5810bd313b769f532886bfcd2f1/43976798197.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/fisoneviro.pdfIn PDF document text
    • http://xnucleus.com/members/member_images/files/55451476936.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/17611383468.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/67638407813.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/zowipaparinejegixan.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/40302838797.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/tasaral.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/22253926118.pdfIn PDF document text
    • 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_off0000bda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA0 18684 bytes
SHA-256: 4936870eb36e44c688766fa60493118b44191e59e94781a35b2b0f5be8d7f743
font_01_sfnt_off0000ee2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10644 10436 bytes
SHA-256: b88417fd44ebf738de22a754b87c5b3dc76b721028b855b73576f75b119c6d7b

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