Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e0ec35793e84a5…

MALICIOUS

PDF

116.2 KB Created: 2021-09-07 18:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 299839b5e13de09242b4d5c1e160c956 SHA-1: 1a3fef565047f947d88af9b65654743c238c3c19 SHA-256: 64e0ec35793e84a51dd7878b6af873c28e55bd5dc8f00a0112c465f37bb3b9ff
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The primary purpose appears to be directing users to external, potentially malicious, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://crackershrimp.com/file_media/file_image/file/dakuxonudame.pdf In PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/febufegemibujeg.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885d0a9270b---dulokelodumiro.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16112b20368b69---97228887052.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a8e68245a---lesafadipurosugofomirijo.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/97731019290.pdfIn PDF document text
    • http://kleni.cz/userfiles/file/mudojekimixez.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/i0mckqj0tcbaqon8drrq8k93f5/sopisebutadi.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/welupogapos.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/lofifo.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/vosusasogiridufunusejino.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/legibujamifexodovuzorawub.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/68993097163.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/5m38bprdcr9qefgt3dsdtnilt4/30214210651.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/lokibuxolubeduzamowivubag.pdfIn PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/sewirevumogugikekidaluri.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210728_020308.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/desuxu.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609471b7d993e---76323565150.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/eecaff8a1b45d2b6a383528d55cf9ed3/lawisapesa.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/sevazesatetupejom.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/67c9249d96c3d473dc4ab275b95aa2f9/ramexo.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/jududepegel.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8f65b133e---vesez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=pdf+dsm+5+personality+disordersPDF 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_off00015f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000177ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177AB 19308 bytes
SHA-256: 3db3a0effc722cce440db8dd84ebeb77edb5b2dd05dacd223fd24a5e3085280c
font_02_sfnt_off0001a94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A94F 10908 bytes
SHA-256: e0cd14cb349da4d8e072fa74a6f036e576ed866deeda3b15fc2cbb035f7f084e