Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e33b0e9e94b05f…

MALICIOUS

PDF

73.2 KB Created: 2021-03-02 10:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 66674d36c754fd7bfe3ac089f3885c09 SHA-1: 247c558f241c713db0848161c522106514d76bed SHA-256: c6e33b0e9e94b05f979acf7059aa1381dab3ee984210240e2b15dc7222de0a5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, including a link farm heuristic firing, suggesting an attempt to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics point towards an attack pattern involving redirection to compromised or malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/strik?utm_term=2003+ford+mustang+mach+1+specs PDF link annotation
    • http://mon-cmbretagne.com/43151919334826e3.pdfIn PDF document text
    • http://1xbet-regi.site/adobe_illustrator_cs6_crack_dll_64_bitp50lg.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/dqhhchf/74217495417.pdfIn PDF document text
    • https://jisasulozif.weebly.com/uploads/1/3/4/3/134371627/cb77071d993.pdfIn PDF document text
    • http://pubgmobiie.com/angularjs_directive_attribute_without_templatexoe6h.pdfIn PDF document text
    • http://comp-arenda.site/verbs_list_with_hindi_meaning_freexviup.pdfIn PDF document text
    • http://intekzafast.online/brb_cable_catalogue4an1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/xusukesafakitenedopo.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/xinivoson.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/brake_caliper_guide_pin_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/the_constitutional_convention_answer_key_icivics.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/23198054780.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/bakufepedewewalakatiwupuv.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 5932 bytes
SHA-256: 8c61531f161b9007094c072c4066bb2c722850059ffe2e56dbd4d77ab8d05136
font_01_sfnt_off0000f353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 10668 bytes
SHA-256: c4207ea578dbcf88a552cf0a292210dcb3b54519edefd747fda97bdde76b6830

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