Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25e51ad1da5db27…

MALICIOUS

PDF

47.7 KB Created: 2020-10-04 08:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 40a6420f64673fa01c2dff265122719d SHA-1: 2bfced43f3b202cf1a4a18536f4d17e441e5adda SHA-256: e25e51ad1da5db276f7a948e8fde71d68324a7995a6be80917912b6c000e1c60
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://cctraff.ru/pify?keyword=vertical+jump+bible+pdf+reddit In PDF document text
    • http://sinik.nimblehillbrewing.com/uploads/1/3/0/7/130776007/3543745.pdfIn PDF document text
    • http://files.randysnfldcountrymusic.com/uploads/1/3/1/8/131872238/parararesole.pdfIn PDF document text
    • http://files.kelsoband.org/uploads/1/3/0/8/130813906/5199735.pdfIn PDF document text
    • http://vezesi.helpinghandsrescue.org/uploads/1/3/2/8/132815806/dizaku_webeto_dimokekipune_tones.pdfIn PDF document text
    • http://wurijim.wellingtongrillcolorado.com/uploads/1/3/0/9/130969300/lekeruzabata.pdfIn PDF document text
    • http://files.hookedbylynn.com/uploads/1/3/0/8/130874104/bujoludig_bosupisadunodo_tigotivomin_lilejapazo.pdfIn PDF document text
    • http://files.darrenmayner.com/uploads/1/3/1/4/131437487/5132473.pdfIn PDF document text
    • https://site-1039863.mozfiles.com/files/1039863/80351512603.pdfIn PDF document text
    • https://site-1037143.mozfiles.com/files/1037143/detejukugujonovuxuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/minecraft_sp_exe_chomikuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5147/5363/files/dead_target_apk_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2050/7546/files/stihl_ts_700_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3625/4101/files/61191644339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9357/3288/files/root_free_download_apk.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_off00007b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B01 5304 bytes
SHA-256: 1b91f71a3194a32069b7e55fdcab0b3defe8c67f13b514f7c37cfc0ef961995f
font_01_sfnt_off00008cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF9 10712 bytes
SHA-256: a3181572b64a8bdd0ff3da724d30d27eee2ec368931381ecf7a31f078e052767