Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb685d7b6d7acb5…

MALICIOUS

PDF

74.8 KB Created: 2021-01-13 16:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6db1decd3993f7001fa157b7792f61b4 SHA-1: 79c76ecf9b7fd4f1c75fbd800954472b6d053826 SHA-256: 0eb685d7b6d7acb50feb447b547f6c6cbd3cc5d41b4e663cf75172c8f1e7edd7
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a malicious redirector. The heuristic firings indicate the document is designed to link to a large number of external PDFs, likely for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/aws?utm_term=book+layout+template+free+indesign In PDF document text
    • https://site-1168250.mozfiles.com/files/1168250/subway_restaurants_rapid_city_sd_downtown.pdfIn PDF document text
    • https://movogabi.weebly.com/uploads/1/3/4/8/134881325/e08a76f90ebb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387427/normal_5fde8846531db.pdfIn PDF document text
    • https://birexekexujivas.weebly.com/uploads/1/3/1/8/131858685/1953290.pdfIn PDF document text
    • https://site-1168354.mozfiles.com/files/1168354/modern_acoustic_blues_musicians.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f964854656de.pdfIn PDF document text
    • https://site-1168251.mozfiles.com/files/1168251/sabado_gigante_host.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/GGQQibj/vitamin_d_side_effects_anxiety.pdfIn PDF document text
    • https://site-1178831.mozfiles.com/files/1178831/82142341904.pdfIn PDF document text
    • https://site-1168324.mozfiles.com/files/1168324/dunofejesukojewagasimod.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/begijufadi/conditionals_exercise_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/komituxeko.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/81208384584.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/35094586180.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_off0000e429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE429 5576 bytes
SHA-256: e70273054bdf6625cb86715ef0dd4792b08dd27d583d077b17481ad9f857ac92
font_01_sfnt_off0000f727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF727 10996 bytes
SHA-256: 174283ffab68e42eeba1ee34a1e6581588c48ec427c4b10f2836865b9e85b3f4

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