Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef11d87384e01fad…

MALICIOUS

PDF

70.2 KB Created: 2020-11-22 16:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fd6b71c13de902a0b0b620dba8a0d556 SHA-1: 1dece44f51895f2ab458a7a370401bb37cf76b2a SHA-256: ef11d87384e01fadc5adfc975fcac0db035469a5c6fa8a7e191d060184be1647
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to drive traffic to various websites. One of these URLs, 'https://trafftec.ru/123?utm_term=vic+domen+norton+rose', is flagged as suspicious. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

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://trafftec.ru/123?utm_term=vic+domen+norton+rose PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382793/normal_5f8d2a9c41020.pdfIn PDF document text
    • https://renikafajuwigag.weebly.com/uploads/1/3/4/3/134317319/rowolonema-zulukovifot-gujijiv.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/dubawewu-ruvexumobeze-juguzedoto.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/53007ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gogonof/garry_s_mod_free_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/presto_01362_6-quart_stainless_steel_pressure_cooker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd51b6e5-72e6-4a57-b8b4-6ad4b2f22998/8437946192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c805c387-6a5b-44da-b48c-38dee658b7a4/pindyck_and_rubinfeld_microeconomics.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/planos_arquitectonicos_de_casas_con_medidas.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/slovak_names_for_girls.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/the_blood_of_olympus_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96D 4596 bytes
SHA-256: c9549ed2d0da630bb029047bceb8a282053eadfc40cd82697ee237554e5f58a3
font_01_sfnt_off0000d8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E6 10848 bytes
SHA-256: 2e1b33825e28123d16f80ec832d0d6a635124f7b87b0e4476ff4c03c34785420
font_02_sfnt_off0000fdea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEA 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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