Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c84aace8d050cd…

MALICIOUS

PDF

79.3 KB Created: 2020-11-16 21:43:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 468d67bd2e4a73cd39f2c1658e7ea0fc SHA-1: b99c80cfaa4ab837c0b2f9a107ba9a581f3dc172 SHA-256: 48c84aace8d050cdf2cf6f0501c1eb5b1edaa35a0924f500420f5333d59f952c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=racks+on+racks+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8722a2e6b92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f9c69319994a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f8db7c17264c.pdfIn PDF document text
    • https://jirunemopisitex.weebly.com/uploads/1/3/4/3/134332051/2595422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f873e0650445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_5f9fb105f3676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f87272f84053.pdfIn PDF document text
    • https://dedaruxije.weebly.com/uploads/1/3/4/4/134455514/wujazur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_5faf9273efa20.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/robumuduluwise/59556046442.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/airport_economic_regulatory_authority_of_india_act_2008.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/8796066658.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/ada_diabetes_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/clay_county_library_jobs.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7C 4448 bytes
SHA-256: 2139c9854e463680f2d7bc5db339a9082837ccf520432e33a190243e33f28acb
font_01_sfnt_off0000ef22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF22 4556 bytes
SHA-256: 9c0826baf08fd9f4c0d00a508d1c250987cbfd711a723bc02f8546081651e021
font_02_sfnt_off0000fe96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 10404 bytes
SHA-256: cd433983ac09011007f778a483755d943fdf9984212dcf1dd637e1a6682c3f53
font_03_sfnt_off00012231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12231 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.