Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a29862e8304086…

MALICIOUS

PDF

81.5 KB Created: 2021-09-07 14:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c28dd7ec6c02b0f1cd820318987cac4a SHA-1: ab1bba08e841d128782f452dfb9f2b2c40173d70 SHA-256: b1a29862e83040867f8a463f0e9bca2a3bd56e99ccba749c98085e0d5a05cfa7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides a password to decrypt a malicious archive, a common tactic to evade security scanning. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e04522f7d0---56464417038.pdf In PDF document text
    • https://dichocungtoi.com/userfiles/file/nabudavutakalakapol.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/1gs8crg86493qnslsbs2ab1one/berotesapejinezedipifexi.pdfIn PDF document text
    • http://daiwavn.com/uploads/image/files/jofedimokapamafoxiwanogo.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/08/files/210802201803.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/fageribow.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/pubofexu.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210628_124250.pdfIn PDF document text
    • http://hillcrestneighborhoods.com/userimages/51996836060.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/0c55f177df3493571c7e5268f0533f14/98692403775.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a490d5db028---54416707774.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/84ed09ef1caa13c69f18715693f7582e/357146038.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/37740592504.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/94102963931.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/8390604348.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210519211603.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/64462731741.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/2i1l2cms1shm6h28414m6ismtf/turum.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/94588477317.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/rolenuzazavenatuvobofa.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/7912006551.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=protect+worksheet+in+excel+2003PDF 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_off0000db09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 10860 bytes
SHA-256: 702076380dad6d377ee8bbb6b96325fc1088cbe6b4331a65d95805049380a903
font_02_sfnt_off00010c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C52 17020 bytes
SHA-256: 2a57eef8cad2ce0e18317e223d3a44d58078896bf385ff7ba29ca6b287a3e37f

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