Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2f44123da0e93f…

MALICIOUS

PDF

76.3 KB Created: 2021-03-01 10:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e5893933ec4557eff666acb4f308f4b4 SHA-1: 82392c660fc99b95e7b8be7a73d1482840980eb2 SHA-256: 0a2f44123da0e93f8157573262d8d592a08e53fdb9e79f54541ea4eac24abcac
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Nancy Drew' to encourage clicking on the primary malicious URL. The presence of numerous links and disposable hosting indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://pelibifir.ru/award?keyword=nancy+drew+season+1+episode+8+trailer PDF link annotation
    • http://lupepujalin.iblogger.org/garumenurozudav.pdfIn PDF document text
    • https://gomibabojusul.weebly.com/uploads/1/3/1/4/131483197/7e8a2536.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/j7Hxtaz/85045330395.pdfIn PDF document text
    • http://fovijivil.iblogger.org/72874384813.pdfIn PDF document text
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/dibudumulugalesitu.pdfIn PDF document text
    • https://nijumaweka.weebly.com/uploads/1/3/1/3/131379182/xinigonilu.pdfIn PDF document text
    • http://vemexulitoko.iblogger.org/antes_de_empezar_saluda_a_todo_el_pblico._recuerda_1_of_1.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/MNBjaKY/fexujotadufufatoj.pdfIn PDF document text
    • https://nefirekemoziwep.weebly.com/uploads/1/3/4/3/134332842/gutuxegetoxazaru.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/6gfjqjb/train_race_game_download_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nagajawonusagu.epizy.com/35247805306.pdfIn PDF document text
    • http://zatafefot.rf.gd/91584091032.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/gufapip.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_off0000eec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 5476 bytes
SHA-256: 5e32688638b71cc959edf8a5ea5fe8d80b06bc984a61ba615f4b3be665f81957
font_01_sfnt_off00010196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10196 10164 bytes
SHA-256: f5c1d04e0c008a183cfea923877b711845ae7e7871dfc98dad67d2cb60f51969

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