Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba38dcabcf3b15ce…

MALICIOUS

PDF

73.4 KB Created: 2021-08-28 02:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bbabeaa65d5fdc6b022fff66afcbb355 SHA-1: ff21f6be799aac472e1fdbc6994e5102252a748f SHA-256: ba38dcabcf3b15cee6f93463fa2cbf33706320cf37bb091dd8f02b4f255a8605
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure itself appears to be a link farm, designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/42615541211.pdf In PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/7e0ffb59fe0862d1a14a2dadd67b6106/wuvanidebemopimuperere.pdfIn PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/98161873208.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/786160bb8267c74f2a638208b0798f63/tawopozepezur.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/85411047284.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/bawajotorunuxuvuwuga.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/fa275102c98be90eb601a8ca32ef3475/29921152948.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161216b7ab5481---kakonufiridavolaguzurari.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/mijimevaxavusotuduxofud.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/uholtpsb6ebm4b5tmip9n7cbi3/50158875943.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/48233908104.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/bopokugus.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/21783737456.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b158f04967c---75738513503.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d18c3cc11d45872969a0706044d5b29b/73389149556.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/e7o754jvs3hgtfrhq6b94jfsdf/bafagemopumagoki.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d91c82513---75712131651.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/33846217462.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/kiriboxol.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd38349f267---vuriloridad.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/6630483dd2663095674fb0d8d49dc3a8/76854966459.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/0212cb2cb41ef442dae2a74d7c2d81ae/tibozatolamafel.pdfIn PDF document text
    • https://bczenekar.hu/files/file/89172274455.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=dignity+for+youPDF 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_off0000c154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC154 10096 bytes
SHA-256: 2c558dff7bf5fd2f7e20aa814223ecfcbc906d86a68403933948c10e0b5ae62f
font_01_sfnt_off0000d7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 15516 bytes
SHA-256: 92a6f39dd4b38cb0a74fc283e818a9002e2f42f9913f44576aba38b496dcca66

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