Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c09d977721b6506…

MALICIOUS

PDF

77.3 KB Created: 2021-09-13 09:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86204bca7d4af603cddf120110b8d945 SHA-1: e6428a7218c369745c8c1c54b5b1a56404feac9e SHA-256: 6c09d977721b65067ffcc138919d7c733d3b004c006c3dc9dbb8e3421603ed38
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate the PDF acts as a link farm, directing users to multiple disposable domains, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the structure and URL findings strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/tidoxubu.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b74b88a25---gamulajinazibokoxu.pdf
    • http://mertcelikkapi.com/userfiles/file/78037775642.pdf
    • http://longchimvac.net/app/webroot/uploads/files/degizewajusanedosonowefap.pdf
    • http://kimandyoo.com/userfiles/file/3227127510.pdf
    • http://ndt-ultratech.com/files/58264632269.pdf
    • https://hongming-eco.com/userfiles/file/marimekajitalivipar.pdf
    • https://sarenpinler.com/calisma2/files/uploads/21046113734.pdf
    • http://studiophotosfashion.it/userfiles/files/80725134229.pdf
    • http://istihdamhaberleri.com/upload/ckfinder/files/bebifarum.pdf
    • http://abnicum.com/files/file/89189851357.pdf
    • http://encino.ilovepokebar.com/uploads/files/warogen.pdf
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/xoxenuwizuvinifimuninobaz.pdf
    • https://noventa.cz/media/files/file/82561379027.pdf
    • https://arhstroi.by/uploads/files/94895398044.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a85ed9373f---10425376509.pdf
    • http://eakqshop.com/ckfinder/images_store/files/vosojol.pdf
    • http://sochi-polyana.com/ckfinder/userfiles/files/movasejojapinoxa.pdf
    • https://granitnet.hu/editor_up/lujaponixak.pdf
    • http://satisfytech.com/ck/upload/files/xepuw.pdf
    • https://ladida.asia/sporlegen/administrator/imagetempfile/komunixejamawe.pdf
    • http://www.firengo.com/userfiles/files/nupanibun.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=dhoom+3+full+movie+download+123mkv
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7e0.bin
b8e636465f9608cd9e051860d02fff9ff42b65ce646b66891bf389e2b509b9e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E0 17844 bytes
font_01_sfnt_off0000f67b.bin
c42b1560d399eeae5b7e9d71bb1af0fef4a7925d7e0ea66ff2f7f75b3b197fa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF67B 10944 bytes
font_02_sfnt_off00010fc5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC5 16792 bytes

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