Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c4cc03c5d9288c…

MALICIOUS

PDF

39.3 KB Created: 2020-11-05 12:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ecf796376ab540a592426a1c35ee44e2 SHA-1: 3838c6a6d68542a5cb1082499232911ac4be9fc4 SHA-256: 62c4cc03c5d9288c296076018cb19ca2c550c6bf9f0fde90534de5cf9f766fdd
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/123?keyword=tronok+harca+online In PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/zaponekigi-ganadefokivera-vasuxure.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/pasex.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/posazujiranobu.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/8597583.pdfIn PDF document text
    • https://kukezuleji.weebly.com/uploads/1/3/4/3/134361302/302b7ec4e.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/wizedumi/xiliwopanigi.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/skyrim_se_rdo_immersive_horses.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/43245498116.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/zoll_m_series_cct_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/zero_zero_zero_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/famous_biography_books.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/tongue_twisters_for_kids_a-z.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_off00005cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF3 4724 bytes
SHA-256: ef008fe2cbfc902934dff3a72c87b33fea37dd825674ae6296eb3e548ec6fd96
font_01_sfnt_off00006cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF9 10504 bytes
SHA-256: e56a75529a905957a3ee3cbcfc52cb8d7cc3e45dbeae451b4427697fd23d264f