Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72498c67e279a2f…

MALICIOUS

PDF

71.7 KB Created: 2021-01-17 12:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6d96c0bdc25a32aab86c8247c1a7a12b SHA-1: d7c22eb5aed2079916cf00369324e47d90fa7408 SHA-256: c72498c67e279a2fe93eeb7421edd5dd336be8179e88a9d498dc5c6396e6fe2a
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=bootstrap+grid++ai'. The ML classifier also assigned a very high probability of maliciousness. While no scripts were extracted, the presence of a known malicious redirector strongly suggests this document is intended to lure users to a harmful destination, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/aws?utm_term=bootstrap+grid++ai In PDF document text
    • https://site-1178842.mozfiles.com/files/1178842/ecco_guidelines_ulcerative_colitis_2015.pdfIn PDF document text
    • https://cdn.sqhk.co/tisumusef/5hiOmL2/65022980908.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/igbjfjb/november_december_2020_calendar_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/7gh6Fsz/41968709171.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/RigcCll/shopdisney_uk_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/gi5hdhj/29807747451.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/7rHOWid/38981303371.pdfIn PDF document text
    • https://site-1175605.mozfiles.com/files/1175605/birerixidokubujojozuvefad.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/jagjiat/spirit_rune_3_hypixel_skyblock.pdfIn PDF document text
    • https://site-1168140.mozfiles.com/files/1168140/16357639578.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/jdjhOJa/fifejojutuxomelo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vobejuk.rf.gd/sugowudedogigivujudutixi.pdfIn PDF document text
    • http://lojupefiduk.epizy.com/ca_full_information_in_english.pdfIn PDF document text
    • http://puwojewemuxa.epizy.com/canon_ts3122_setup.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_off0000cf3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3F 5144 bytes
SHA-256: 16c85e487e9e7af5c7e3dc4a6c908cfb71539066521edda5032cdb1cbdf2a159
font_01_sfnt_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 2512 bytes
SHA-256: 085f322c79513b4895e6b5ea00a972e94223ad8acbe441c73456139a31bca323
font_02_sfnt_off0000ebb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB5 10596 bytes
SHA-256: 7b15d4b782ce1a53ceb28ae52271daa5f8f9cf94be98cc71c2bcc4f84e93c6bc

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