Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9fb0085812d24e1…

MALICIOUS

PDF

71.5 KB Created: 2021-01-16 15:41:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7317394af43fac82de18ae52410df827 SHA-1: b824eba45d9301466216baa9ff1ceb7038675708 SHA-256: c9fb0085812d24e1e64179b617b66e0289ca8c8031045cae62b2a090a1887059
154 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://traffking.ru/123?utm_term=ge+xl44+light+oven+manually'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, characteristic of phishing or malware delivery via a spearphishing attachment.

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://traffking.ru/123?utm_term=ge+xl44+light+oven+manually In PDF document text
    • https://static.s123-cdn-static.com/uploads/4425929/normal_5fc77610f3422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_5fa7a314ba5b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382629/normal_5fca6e42246b8.pdfIn PDF document text
    • https://site-1171371.mozfiles.com/files/1171371/garden_candy_tomatoes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485166/normal_5fffce118a86e.pdfIn PDF document text
    • https://site-1210823.mozfiles.com/files/1210823/holy_bible_niv_offline_free.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/forupokisip/43678834175.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/tozimotebaguse.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/cours_carburetion.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/bang_bang_movie_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/pokemon_coloring_sheets_sun_and_moon.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/wowakidexotepekefizusa.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/candy_camera_2017_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/xaxumezuzunadunotone.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_off0000dbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC5 5172 bytes
SHA-256: c63562663734375839b5c0090bf10e975e4f05ac8aad6325bb5bb0b366d50d91
font_01_sfnt_off0000ed56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 10532 bytes
SHA-256: 883d8b9ae62d6865e749680a2aceb0daf160233362d36e59fc4f9c4afea559a8

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