Malicious PDF — malware analysis report

Static analysis result for SHA-256 124f11412c780527…

MALICIOUS

PDF

72.8 KB Created: 2021-09-19 01:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 47d0b166383571562c834898458c7ddc SHA-1: 6af6ab97ca00df29b057841f5a245079d06a3b5e SHA-256: 124f11412c780527eb9124e1c101bc32db0d085130b4ddb59182674a69afad9b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that the PDF is used to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://24cvety.ru/upload/files/fetevomedasiretirub.pdf In PDF document text
    • http://langmypham.com/luutru/files/88900865783.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/danid.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/74942625398.pdfIn PDF document text
    • http://malifer.hu/upload/file/nejisixa.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/35232247300.pdfIn PDF document text
    • http://www.moyekolodin.com/files/siparereban.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/98705331694.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613af8206adc6---69021249295.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/75380946909.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/pupewobofexe.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc0773e6a6---45652088293.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/pilum.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/26478003380.pdfIn PDF document text
    • http://we-women.de/default/files/uploads/file/96552364467.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/fozomironomofukurib.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/85317886385.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/49959578352.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/21100552177.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/56367953487.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/9534324175.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/80637181195.pdfIn PDF document text
    • http://kodemari.info/data/files/nevabifurinuli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+binding+of+isaac+unblocked+77PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000ba30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA30 10900 bytes
SHA-256: aae7c8a74f52135952d9b8228c843158b6ab0f20c76a854f5e477bcddf78e3b4
font_01_sfnt_off0000d326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD326 16504 bytes
SHA-256: 68c807c456328fab98c1bb6ace5135433150d9f8f1da28de955cb6fde39fb0a1
font_02_sfnt_off0000fd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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