Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e701979d051f66…

MALICIOUS

PDF

126.6 KB Created: 2021-06-27 00:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bcf9c8c681fcbfd40d56ec9be2d616b SHA-1: c01fee9c0e71d48e08f09dfeea6f0163fbf64c4d SHA-256: 04e701979d051f6640b45375ea35237eec78c837ab896fde6a62f9c893c786d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9651

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://krisoc.ru/uplcv?utm_term=carnage+of+krell
    • http://myphamlulanjina.com/upload/files/venubamaz.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0a644a699---xufugufaj.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c48249e7211---24908828055.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160be5078443f4---rejabimafixuvufazevajik.pdf
    • https://abicecream.ru/ckfinder/userfiles/files/ronaresimiz.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095eec460b1f---68459454860.pdf
    • http://ambulanceservice.pl/userfiles/file/76069754577.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/5f0167a55af7a754d823532e8e2d5bcb/lusilupoteboxatufet.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608758fb5ceb0---5325167058.pdf
    • http://oreade-breche.fr/userfiles/file/laposap.pdf
    • http://hnkingdee.cn/Files/file/202161914625.pdf
    • https://menu2uplus.com/images/file/71729326536.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/a40e02ede8748305a58503b17df9d7cb/93356786832.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b223f54726---40761218288.pdf
    • http://zabradli-znerezu.cz/userfiles/file/fibegemevatipabadikak.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/0b49917b41ff095981acf101f11a3800/10125456203.pdf
    • https://tonitomov.com/picture/file/jizitivakamebupirabitosab.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f597a030e0---72716903678.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d95e291c18---linamini.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160974a6204b0e---vatifokuli.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f9c3480c4---6435003023.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d51e595762---153658544.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f468d8130---2175031262.pdf
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00014a79.bin
bf9d04d7e954f30348913bd5818daca4218fa27516cab134f1dd5158749e7f5a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14A79 26160 bytes
font_01_sfnt_off000192a7.bin
2c1974c659a37ddd0a674cef92ce3d17cc99dbbc60c0cab29dd8455829fac900		 pdf-font-stream PDF embedded font (sfnt) at offset 0x192A7 2128 bytes
font_02_sfnt_off00019bfd.bin
35c3a7add70dd7923aeb52ceedfd27961a6477c5ea89cfdf48f77de62991b07a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19BFD 19544 bytes
font_03_sfnt_off0001bdb1.bin
c775fcd2d7a69f3e6938b5b1658b4fa6fbaeb2f4bbd3cb081af8f094910c1dce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDB1 10156 bytes
font_04_sfnt_off0001d48d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D48D 16792 bytes

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