Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedbb60d8bab131a…

MALICIOUS

PDF

77.5 KB Created: 2021-02-20 13:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fcaec0a4e4257e732365b5d95c7b3181 SHA-1: fb41f4218538d3e99016377cc9903e607c7d5723 SHA-256: fedbb60d8bab131a09bf91c0f13121de9921fc86f8c633f416a0ae07bb23f702
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also flagged this PDF with a high probability of being malicious. The embedded URL, 'https://yafferge.ru/123?utm_term=how+to+wash+chicco+nextfit+zip+headrest', is the primary indicator of malicious intent, likely leading to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=how+to+wash+chicco+nextfit+zip+headrest In PDF document text
    • https://static.s123-cdn-static.com/uploads/4382966/normal_5fe0f5a99db02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_600ff098d70d0.pdfIn PDF document text
    • https://cdn.sqhk.co/miweguzeg/j2jdgig/life_is_strange_chloe_and_rachel_figures.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/Jjiiine/the_stackyard_sunderland_west_herrington_houghton-_le-_spring.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/jkmN6he/electronic_rust_prevention_systems_erps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_6029a2a6ed8a2.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/jfjjpjj/gisipe.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/liwara/kumibunatu.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/fepupasiru.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/zamarabaziruxewal.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/bopunutaligoge.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/55689282925.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_off0000f100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 5380 bytes
SHA-256: 3124d10599f18204c417a968b904fd3bd58bba2dc07491667e5ea4fe9f1f5f1c
font_01_sfnt_off0001036b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036B 10988 bytes
SHA-256: 384679d7c57ca31f32c9ff7153e0174fd2c42b08a9f73b1684fb2824fb607f3a

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