Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29da58588efe47f…

MALICIOUS

PDF

83.6 KB Created: 2021-09-02 16:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 72a9dd5ac4a26aae32a5b003fae8d54d SHA-1: f80635744ccc95bea86fe263e4a816939d2ac627 SHA-256: d29da58588efe47fbec3280c50c26e71006874b4e956e624cb2fccff8ea45768
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging embedded JavaScript for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607336383fa5c---32790536922.pdf In PDF document text
    • http://1984wnhs.com/clients/2/25/250e0aaa51dad033202e6c34d8602b4d/File/wabapometifuwa.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/sevisiw.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/196e3b4866b9e295eb9eaa1def2c25b1/95776038132.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cec6baec02---juvare.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607460c943d89---vexatoredifeteje.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/b19d8c653073a85c2559034fdb2f88a8/jazivigawonujedan.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087402770c07---doxagi.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/bawitupoz.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160868de505a13---80914751488.pdfIn PDF document text
    • https://qkon.ca/images/file/mobumigekulogezozijemo.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/fixamol.pdfIn PDF document text
    • https://x-software.cz/data/file/xopepixisijawefosoraripo.pdfIn PDF document text
    • http://bptramptour.pl/files/file/pevusum.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/wadikapotelasejepefobivez.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/dukatamibipifat.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d6b2553b4a08d3a3a84426f271244ef6/mipukapefinironavemasa.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/5068cf49b4e871ade525a6ccadcb48b5/jarofi.pdfIn PDF document text
    • https://schmitz.cz/res/file/gefusofuvobotaxiwov.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/mujegurazure.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/20257338440.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/waferowumesezudibafig.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/dofinigaronaxevunavox.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305dd7f383b---94955408764.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608324cb43a81---21072879352.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=human+resources+department+functions+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_off0000e033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE033 18292 bytes
SHA-256: 262fa16fe327e518215d00a384ce6fe62e3bc27bfad464bceefa8ca0121b6b94
font_01_sfnt_off00010fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BF 10824 bytes
SHA-256: bce4d8e9fcbe8ce224c120fb22fef56a0de61ce85e078b1ffe50e3b79572a087

Open this report in the interactive analyzer, or submit your own file for analysis.