Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26117c199d8b3c5…

MALICIOUS

PDF

64.0 KB Created: 2020-12-30 12:06:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4b41e2befbbc41232cfe9f346378f5c7 SHA-1: fa13421b9e6216e03135cbf0962e63b4af003c11 SHA-256: c26117c199d8b3c5cd02ef0d2b414b6233c2da9d65ac48ab6d2a1d246a113d71
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=el+libro+de+arena'. Additionally, a machine learning classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and unreadable, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 3

  • 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.
  • 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://gettraff.ru/123?utm_term=el+libro+de+arena In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_5fb5c3f6d0680.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/1hfPhbP/carrie_underwood_concert_2019_song_list.pdfIn PDF document text
    • https://cdn.sqhk.co/retuwami/aziehIk/jibonikiwezitipuduvovo.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/ijbuiiJ/zesogoxufavujuziwulipeju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411700/normal_5fe58075d9c7b.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/gjjdhbk/movie_maternal_instinct_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/sugjYgf/operation_market_garden_polish_casualties.pdfIn PDF document text
    • https://cdn.sqhk.co/podiwilur/4ghaghi/bombastic_bling_roblox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366654/normal_5fdff44499465.pdfIn PDF document text
    • https://cdn.sqhk.co/taranumota/ETNiijh/fear_the_walking_dead_full_cast_season_5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404123/normal_5f9b79a5ef2ef.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/ejjzkIR/the_crusades_through_arab_eyes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496005/normal_5fca12381f2c4.pdfIn PDF document text
    • https://cdn.sqhk.co/morexemodoju/ieRTENW/tumblr_wallpaper_hd_phone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57c89a8-3038-4de4-bf6c-a1132ae12862/sisenerozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7c289f-c64a-44c3-aae9-b4b4c6c775c4/bupobibitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89bb0ced-c03c-40a9-acbc-b6f9f61dca48/gopomumuputekex.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97F 4448 bytes
SHA-256: 76aa714225d4a979cbf1302eb7160dfb7824a5b6bf52f37f6614adf3c7fa2c9c