Malicious PDF — malware analysis report

Static analysis result for SHA-256 75325cabb9734b4b…

MALICIOUS

PDF

80.4 KB Created: 2021-09-20 16:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03916df1352d014d3dae50ed3965972f SHA-1: 9bf4b3357125c46a80992df9b14f7c6ce754970f SHA-256: 75325cabb9734b4b7e9d4c7d58ee6b90158c82b75a37bbc79b505bc93084b793
146 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 multiple embedded URIs, including one pointing to a raw IP address, which are likely used to redirect users to malicious sites. The PDF's structure and embedded links suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cameranichietsu.com/luutru/files/tefadowuwoxotaxif.pdf
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/25477844927.pdf
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/79987873298.pdf
    • http://villa-carlshorst.de/sites/default/files/file/xipik.pdf
    • http://wksx.top/images/userfiles/file/48850537262.pdf
    • https://jeevadhara.org/work/london/userfiles/file/56161267434.pdf
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/nenajajefev.pdf
    • http://csc0898.com/userfiles/file/20210908175143_iuwlif.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/e90te5ksmq2t8sjfnl5c2bfft3/larorizaf.pdf
    • https://h1t-urlaurora1-turbo.com/contents/files/zubinozugovodirewova.pdf
    • http://oilspecchem.com/files/gasuralemesixufofanoga.pdf
    • http://s-pack.kr/userfiles/file/20210912175834.pdf
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/lamodimoramiwagokodo.pdf
    • http://grafiport.com/userfiles/file/95952732448.pdf
    • http://bytip.net/filespath/files/20210905123528.pdf
    • http://www.bash.cl/media/file/72829775060.pdf
    • https://cnn-logistics.com/asset/files/62550950176.pdf
    • http://211.129.1.225/system/ckfinder/userfiles/files/dawuv.pdf
    • http://hladonural.ru/upload_picture/69519760506.pdf
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sagije.pdf
    • http://lamekatus.ee/uploads/ckeditor/files/77005895661.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d82f541c3d---48834750485.pdf
    • http://le-nora.com/userfiles/file/pufetuvisoviwases.pdf
    • http://cesishotel.lv/res/wysiwyg/file/rilopiwinumepawi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=my+hero+academia+season+2+episode+22+dub
    • 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_off0000d5ae.bin
345b25c26afc3c8e1ccf7311c83396c63b8ff15f1dcf295f76f2bd139c7ad301		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AE 11100 bytes
font_01_sfnt_off0000ef36.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 16792 bytes
font_02_sfnt_off00010748.bin
1c0fe4900150fa2f74bf8179604b18e1e35bb00bd3eb7c6d09ea9b9c53870bc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10748 17356 bytes

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