Malicious PDF — malware analysis report

Static analysis result for SHA-256 f127a8885f0198e2…

MALICIOUS

PDF

75.4 KB Created: 2021-02-27 15:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f0edfe2aa28e8e487160454b1ab14616 SHA-1: c0f0dad9f2bde6226498c171c6256db7fdb418a1 SHA-256: f127a8885f0198e2bc5f7e7d4dc7730aa11c97a2adba04694a5f551fb53d0fdb
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The document body, though heavily garbled, contains references to 'Harry potter libros coleccion español' and the wkhtmltopdf generator, suggesting a lure. The presence of numerous external URLs, including one flagged as a link farm on disposable hosting, further supports a malicious intent to redirect users to potentially harmful content.

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
  • 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://baarspo.ru/strik?utm_term=harry+potter+libros+coleccion+espa%25C3%25B1ol PDF link annotation
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/54ca8cad941267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503390/normal_5fecbfaf2a696.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413125/normal_5fcd44661f48e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458615/normal_60238231426c3.pdfIn PDF document text
    • http://com-connexion.xyz/boone_county_iowa_police_reportsdby1m.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/zibizofofukem_fiwanufitazi.pdfIn PDF document text
    • https://kutijodokijo.weebly.com/uploads/1/3/4/7/134706590/nanedoredorese-bikibamaru.pdfIn PDF document text
    • http://baby-slings.ru/26388646930hee0o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudupaxub.myartsonline.com/what_is_the_implication_of_ethics_in_health_and_physical_education.pdfIn PDF document text
    • http://fevojofutowi.epizy.com/what_to_ask_for_in_union_contract_negotiations.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/pet_rocks_for_sale_ebay.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_off0000e6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F0 5340 bytes
SHA-256: f340c60f6b13320385c49355bda16ad7176143b989e3a2a84e97df084fb80fbc
font_01_sfnt_off0000f8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 11732 bytes
SHA-256: 9fc40639531f75a2b87e38a87c62986a37c9a58d75c36906515abc2e3fcafb1c

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