Malicious PDF — malware analysis report

Static analysis result for SHA-256 e671352f04c7d39e…

MALICIOUS

PDF

80.4 KB Created: 2021-02-20 04:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6d5a595050dd9b3ca7fcc6ce040641c7 SHA-1: 82c5047f45f9963989761d0a56e8571673ecf166 SHA-256: e671352f04c7d39e03917d7147999988d5ec3135173b043be706a40aeb7b636a
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure, possibly related to the 'La metamorfosis' theme, directing users to external sites.

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/strik?utm_term=la+metamorfosis+personaje+principal In PDF document text
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5ffbc70e571e5.pdfIn PDF document text
    • http://intekzafast.online/how_much_should_i_pay_for_a_miniature_dachshundvnjr7.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/79909674616w6g3n.pdfIn PDF document text
    • http://mon-cmb.best/lofixowasiwukozoxvhexk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_602cda49062f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460980/normal_6027e2926bf7c.pdfIn PDF document text
    • http://universe1.space/michelin_guide_london_soho4ldpe.pdfIn PDF document text
    • http://slampochka.ru/xiwebipewaronagavitavori0mjas.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/d0x6qt4/life_is_strange_soundtrack_cd_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470400/normal_601d4ee13606d.pdfIn PDF document text
    • https://cdn.sqhk.co/wivodojeg/hfHz9ji/99499038781.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/smajeXL/bemugaxox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://webakipi.epizy.com/dbx_driverack_pa2_price_in_india.pdfIn PDF document text
    • http://gotewadale.epizy.com/simple_present_exercises_for_beginners_questions.pdfIn PDF document text
    • http://nomapalugaji.epizy.com/distributive_property_word_problems_worksheet.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_off0000fbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD2 5176 bytes
SHA-256: 2a6bbe7068d0095f0bda8a9c1c33d9102c38b621104c98fc37f8a6f0d5389955
font_01_sfnt_off00010d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D65 11928 bytes
SHA-256: fd89b4c96684f50a7662b40deba643f03767385a1db05648a257de5e73a88de7

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