Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c26dc56802bf7e1…

MALICIOUS

PDF

71.7 KB Created: 2021-02-16 09:22:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1aa4a41285f08dd76402b7dd4ca2f907 SHA-1: ba0b45b17434642ebef401ee0c7682777697ac97 SHA-256: 9c26dc56802bf7e119709affc37d1099f34a7e0cee8a2aec373644701060bac4
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to search terms, suggesting a phishing or scam lure.

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=garmin+s62+best+price+uk In PDF document text
    • http://onenature.space/up_board_class_12_maths_syllabus6p0y6.pdfIn PDF document text
    • http://all-host.site/nixozexadowpv0vh.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/7935605.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/lokale_und_temporale_prpositionen_bungenqh31t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368243/normal_5feca2432bb3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_5fd182d0548b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_5fdbec0fbb6e6.pdfIn PDF document text
    • https://deserekinubolid.weebly.com/uploads/1/3/4/3/134319780/zupapapeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494668/normal_5fdff5ece3ad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_602167ee18146.pdfIn PDF document text
    • http://sberpodarok2020.online/fejegevegimanasenijeovvzn.pdfIn PDF document text
    • http://onsideball.info/cobalt_60_radiotherapyhfy2b.pdfIn PDF document text
    • http://helpverifybadges.com/aow3_modding_guidejit4t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482880/normal_600a045b7c2af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416810/normal_5ffe88b037a12.pdfIn PDF document text
    • http://uscarinsurance.info/1464292065x1k07.pdfIn PDF document text
    • http://fortuneocredit.com/16495253547g65gi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD854 5568 bytes
SHA-256: a7d0b21601193fd0605221bbadf459a47ac0e6b51d0612f8fca9eb254d13f20c
font_01_sfnt_off0000eb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 10816 bytes
SHA-256: 83e75df2376218f259bd98fa3a4640cef0e880784db7d3234309bd01fdd47baa

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