Malicious PDF — malware analysis report

Static analysis result for SHA-256 05548942aa3c94d6…

MALICIOUS

PDF

74.7 KB Created: 2021-09-15 23:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cfe0060747f31fe8c5810e8a75581ac SHA-1: b1ac338951c1d9fc23025846db6d657ae272faf3 SHA-256: 05548942aa3c94d696ace77870dfaf37529da21e82ed267ad8ae58fa5835f646
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are structured as link farms, a common tactic for phishing or distributing malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 4

  • 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
  • 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://alice-immo.com/userfiles/file/7234939571.pdf
    • http://professional-tuner.at/uploaded/file/zewafan.pdf
    • http://gugugroup.com/userfiles/pebija.pdf
    • https://sunsetlearningcenter.com/userfiles/file/87727754282.pdf
    • http://www.euro-fly.eu/userfiles/files/jezijebape.pdf
    • http://stoka-saarlouis.de/userfiles/file/tezijosugomikomenijo.pdf
    • https://officialbacknumber.com/editor_up/36479378296.pdf
    • https://kop-trans.pl/uploads/userfiles/files/50182692248.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c9ab53dc6---9702955043.pdf
    • http://chuanghuilaw.com/filespath/files/20210910105232.pdf
    • http://giaydantuongphongkhach.net/images/news/file/pudom.pdf
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/remixexuxosom.pdf
    • http://gesundheit-im-blog.de/userfiles/file/lelepileretodaremonupoki.pdf
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/nabafonoba.pdf
    • http://www.heksan.com.pl/file/zazofe.pdf
    • https://landtop.com/filespath/files/20210904020753.pdf
    • http://ternovykh.ru/content/file/36811907930.pdf
    • http://air-con.ru/upload/files/53965608236.pdf
    • http://akcco.com/userData/board/file/10099594760.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/firosepezalozizumelux.pdf
    • http://na3.it/misc/file/sokejisugifikojelubenubuw.pdf
    • http://drcleancenter.com/uploads/files/202109080458283895.pdf
    • http://grgct.com/ckfinder/userfiles/files/nurejevuduvovop.pdf
    • http://albertopizzetti.it/userfiles/files/26783291608.pdf
    • https://phuketwebstudio.com/ckfinder/userfiles/files/dadexawapegasiletijometul.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=is+it+possible+to+see+who+views+your+instagram
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d833.bin
061bd6c36c9d6fd35e7d86b85c34e4efadd19364202b0c549af000ae537e20ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xD833 11156 bytes
font_01_sfnt_off0000f1f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F7 16792 bytes