Malicious PDF — malware analysis report

Static analysis result for SHA-256 e220107d938702e3…

MALICIOUS

PDF

73.8 KB Created: 2021-02-19 08:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d64431a7aa39deec98eceb7f46849b53 SHA-1: 2920b5b4f20b8be4dbf0bf0145d7d3f30dc0efa9 SHA-256: e220107d938702e3d920dc3749d93b2f1df00fc824a97bd8ab398a079b799728
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, including one pointing to a known malicious redirector at 'https://yafferge.ru/aws?utm_term=cloud+9+smoke+shop+miami'. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of multiple links to disposable hosting further supports a phishing or malware distribution scheme.

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 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.
  • 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://yafferge.ru/aws?utm_term=cloud+9+smoke+shop+miami In PDF document text
    • http://republvinb.fun/addicted_full_movie_free_2014m0eum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413977/normal_5ff06b4d47bfc.pdfIn PDF document text
    • http://legendbilisim.com/21277639512tltjh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453537/normal_6011e0252f125.pdfIn PDF document text
    • http://afracheat2.xyz/fosuvixirixapotulufunof6c5s8.pdfIn PDF document text
    • https://cdn.sqhk.co/gagowuname/PhhFvjd/xogadowojuvoduvatotaxozat.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/aVgiAgd/merchant_of_venice_quotes_and_techniques.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5fd7c95e29341.pdfIn PDF document text
    • https://cdn.sqhk.co/vanatuwo/heMTjhC/torejuzaxobelojo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_6002110cd0111.pdfIn PDF document text
    • http://aromaita.space/xomovuxuvajetelezalelavx0cw.pdfIn PDF document text
    • https://cdn.sqhk.co/wuseguwe/vvgcfgg/oxygen_saturation_monitor_walgreens.pdfIn PDF document text
    • http://easycreditscore.info/government_of_antigua_and_barbuda_passport_formsl5jk3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456660/normal_6013f460ac53f.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/gd3Yicn/67691726854.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/f0hcwkk/war_commander_rogue_assault_cheat_codes.pdfIn PDF document text
    • http://myirn.icu/lawunojusesuwilidapipulkfuhq.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/pezofut/ggps_bokaro_admission_form_for_class_11.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_off0000d5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C1 5044 bytes
SHA-256: c90cc228d3d2f9fe7fcc82e14ff8da6acf195fa0f946f2f1bcf2f495e6e02d18
font_01_sfnt_off0000e6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E6 10976 bytes
SHA-256: 410861024f48cbd12e3e3566d6efb8b1b6993ce0cbcd76f7ef6206076eabcb52
font_02_sfnt_off00010c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C50 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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