Malicious PDF — malware analysis report

Static analysis result for SHA-256 022085cb1ea4bf36…

MALICIOUS

PDF

90.1 KB Created: 2021-08-10 02:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 590f09347c3f9f0bb724d447429f95de SHA-1: 56f97bd2a238e040a5f9714342357a75d249ed13 SHA-256: 022085cb1ea4bf36fe7557a6aac37183000767a05862bd680ebbd4ad9adbd896
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload locations and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL heuristics are sufficient to infer a malicious link-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://hbphoto.ca/resimler/files/8924717076.pdf In PDF document text
    • http://zh-huaxun.com/uploadfiles/files/16208325365.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8bda42b591f790b75dfade8dbc771e2f/36399110653.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/kajofejewibed.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/mexibatasajobegomoxo.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/wulekajopoxuwaxive.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/sefotudojagemagugomapime.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01dab1b3a---zisevusote.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/82868556453.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d09d99119---91038143309.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/jatajuwemerojakepopil.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/e2625cdd2c4dbb7b9fcaf337962690df/zolamerow.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/rotosuribebizibo.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/15482072582.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b66421699af---68417747304.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16089853a000cf---51506690428.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf589b93b53---57367626425.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/5135e751deb7973149d17e1603bdf0ef/bizesoravejerutodiboj.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160902f5f5bdb6---65691219976.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/80423000006.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/161092860322e3---15408029371.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/wukototipalusikajo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=american+sign+language+basics+pdfPDF 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_off0000fa2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2C 10968 bytes
SHA-256: f9435fe1ef0e3f38e5c2480aa11232a73dc7a7215bae8a6cce411ed30a6af2cb
font_01_sfnt_off00011320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11320 17720 bytes
SHA-256: adab87cb063b967bdb7c39e93780e9de2da1a98013d7ffa84f2efb1ad67fa62f
font_02_sfnt_off000141f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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