Malicious PDF — malware analysis report

Static analysis result for SHA-256 64da29c29bb1a41a…

MALICIOUS

PDF

74.5 KB Created: 2021-09-13 01:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 616724f45f63213a7b9af79831b06a80 SHA-1: ad1ad9cd94ca960f17d713d08ae638ed221feaba SHA-256: 64da29c29bb1a41af810b2cbb3fcd0c6fdf2314c66307d8a61ea3cec197a2f9e
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://klcmekatronik.com/ckfinder/userfiles/files/37386032791.pdf In PDF document text
    • http://kvarkeno56.ru/userfiles/file/bijopononuwenumobipofoka.pdfIn PDF document text
    • https://bloomeng.com/uploads/wovezisasavonuw.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/rapezizizivokiwetagos.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/475861d185eda9315c660266bec6eeca/vikerez.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/51931926288.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/zikilejurefagosipuxo.pdfIn PDF document text
    • https://penzion-palice.cz/content/44488764337.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210904045058.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/12000333622.pdfIn PDF document text
    • http://www.moyekolodin.com/files/48834897240.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/2498c840fb9e8fa8455f4a55682fab25/21472442456.pdfIn PDF document text
    • http://airfa.it/userfiles/file/lulilezekurumozazama.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73685938554.pdfIn PDF document text
    • https://themalc.org/files/file/waminuj.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/80407349128.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/xariwowuvutorajanugewixa.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/32448601731.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/bejewuvogu.pdfIn PDF document text
    • http://www.heksan.com.pl/file/65042521076.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/22365107047.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/7442257882.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/gilalekixinedasojufolu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=half+life+3PDF 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_off0000c3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B7 16756 bytes
SHA-256: a8e5eae78ea979c9a3297c403ae2731fbea1f025b11eef621b0ca0855fb94801
font_01_sfnt_off0000ef26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF26 9780 bytes
SHA-256: 9fb7900130ce1305e1bba1d07a97413ef1d6c8774f77ab5accfaaa91f9e3167a
font_02_sfnt_off0001049e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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