Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1cccd8dc32b8e8…

MALICIOUS

PDF

72.3 KB Created: 2021-01-24 09:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: bbcc26935af380c6651e079fb1d17c79 SHA-1: f991873c79041a3e92089e3e4bb033e42903b588 SHA-256: 0b1cccd8dc32b8e8d70f746cc749ff8a21afbf618841a64e2562b8af1794d2b0
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=love%20island%20the%20game%20season%203%20answers In PDF document text
    • https://static.s123-cdn-static.com/uploads/4426699/normal_5fc749b9a6729.pdfIn PDF document text
    • http://zikapipumimapo.22web.org/zijevuwerazuvan.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/T2zriy6/download_my_talking_pet_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/jfjblTS/crafting_and_building_pc_sin_descargar.pdfIn PDF document text
    • http://dixunawizodel.iblogger.org/plus_size_womens_formal_dresses_sydney.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449183/normal_5ffe9c87cc58c.pdfIn PDF document text
    • https://repugololenip.weebly.com/uploads/1/3/4/8/134880500/rujebononeda-zopikepokal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446260/normal_5ffc01f93a8f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456369/normal_5fd9b670499a1.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/kulinisokakewi/isotopes_ions_and_atoms_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/investment_association_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/madison_luxury_home_sheets_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/26341734873.pdfIn PDF document text
    • http://gonoluripep.rf.gd/chotta_mumbai_malayalam_movie_bgm.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/masok.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_off0000dc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC04 5496 bytes
SHA-256: b16750580df7176e6ff0394f30dcccacbbb3d6afc226488d160b4ea8b84c56d3
font_01_sfnt_off0000ee9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9F 11236 bytes
SHA-256: bcee0b2bc0b720db9890fb5f72fa18ac8a175a6ae96b09569880f43e233bb999

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