Malicious PDF — malware analysis report

Static analysis result for SHA-256 96eab5e336bf8e27…

MALICIOUS

PDF

70.8 KB Created: 2021-09-02 11:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 22d89e4e6b1c4bbfb93f8343c4909fb0 SHA-1: a5e195c78500e8417d40496eb55efe16b2a9840a SHA-256: 96eab5e336bf8e2722b9b8b80786e13fc88cac3dade250e04a42023311e5b689
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple external URIs and link farm indicators suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=computer+and+information+security+handbook+pdf PDF link annotation
    • https://acronimocostanzo.com/userfiles/file/54398240080.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/zopejudefunogunojekerak.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/83879316919.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d606c3a82a---nodunedutufus.pdfIn PDF document text
    • http://intertribo.sk/files/98860102690.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/fosexoxusawot.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/49026329853.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160db799cb7a66---riwizaravusabulaninewodi.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/ed2a05045634bfeb9d2bf253da069663/vasagelababe.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/95917245004.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a728776b41---rilegakogol.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/a56e845d63667e90bb0346363b815a6d/lodawa.pdfIn PDF document text
    • https://menu2uplus.com/images/file/72783248606.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/sinaberedepulobawika.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/gakefujujefiloximikor.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6d1136efc7---nowoxurovuzoribekexodax.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/70220934800.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/8186493807.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/1oumlnlhe15ner1t8aa9kngbj4/43327823138.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/462bfc5791739d58c764a29fb47aada9/bulijopepidilev.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160864da58afd2---40254610905.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/faguzukerefetixufibije.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210727173602.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/1c4ae744a4630b0e7338ee2e12d899be/13542552995.pdfIn PDF document text
    • 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_off0000b6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C7 11316 bytes
SHA-256: 208c7c30ae65be0a8eafa505461170fe53afc961ff0a0a73393390ae5c5fb3e2
font_01_sfnt_off0000d109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD109 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 14588 bytes
SHA-256: 451194309d021801cff30f4576fd642aec466730c82c503e49ca7ba45b24b5a3

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