Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13e2ab86ffbefbd…

MALICIOUS

PDF

83.3 KB Created: 2021-09-09 10:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fd31aea414d1943efbf06a504b6f6f75 SHA-1: 844b70ea19ed125a3b3e8b84d732b47f8de929df SHA-256: f13e2ab86ffbefbdca0bed027d62ccf07158c93f38409f85304d4ae1c564c2d5
164 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 reveal multiple links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports the phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=dua+for+parents+and+family PDF link annotation
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613988fe94352---mutonaluragevedul.pdfIn PDF document text
    • https://notarbrazda.cz/userfiles/file/In PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/92015182521.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/45603246118.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/9507985033.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210902174844.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/sexodemimeziduna.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/78364897955.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/202197208576673.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/19650934046.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/83598766246.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/54268292032.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/juzavuwuvi.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/ridotijow.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/kelopora.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/losaxerujuzaxadawuvozeg.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeafc1ba17---gipex.pdfIn PDF document text
    • https://alemarferries.alemarsnp.gr/ckfinder/userfiles/files/34733893721.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/70586818792.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/mav0jr4irgg938gve97asq3a1b/21773905273.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/42533690705.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161395f02aaa89---pinunaxizixisoj.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E9 10876 bytes
SHA-256: a3efea96e5ef4559381f6e6c39098f03bdf04af51d37886c27a9afbe6e5657c9
font_01_sfnt_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10816 21504 bytes
SHA-256: ff09a6906ed456731282ed15f4829d024e5085fbc0ae8f6b8f5431b701436deb

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