Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46f32500fa3856a…

MALICIOUS

PDF

41.8 KB Created: 2020-10-05 05:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c272557a3e50c69cf4472d5129e99a7b SHA-1: 6d2073a7524a8e89c2ee295811b540ca37fee3da SHA-256: d46f32500fa3856aece4dc047e53dda6ff14160aab2b5e8513546d21dacaf412
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=treasurer%2527+s+report+template+pdf In PDF document text
    • http://files.craigbaldwin.net/uploads/1/3/1/4/131437490/c0f7de.pdfIn PDF document text
    • http://files.theberchmansinitiative.org/uploads/1/3/0/9/130969389/bevesegaz.pdfIn PDF document text
    • http://gipipevip.professionalcatcare.com/uploads/1/3/1/4/131437823/vazuk-gizexuji-vozikubuzekovos.pdfIn PDF document text
    • https://site-1036881.mozfiles.com/files/1036881/83864184356.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/bodosatugarufut.pdfIn PDF document text
    • https://site-1041289.mozfiles.com/files/1041289/77578064212.pdfIn PDF document text
    • https://site-1040879.mozfiles.com/files/1040879/vagujev.pdfIn PDF document text
    • https://site-1038344.mozfiles.com/files/1038344/55631126338.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/1/0482/8233/7444/files/commercial_pilot_oral_exam_guide_audiobook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9098/0253/files/histone_proteins_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3030/9795/files/33239646446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/no_lo_trates_pitbull_lyrics.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_off00006753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6753 5168 bytes
SHA-256: 9e60223e157f84eacd240748556d2d1171b513edef3e7ecf65b84608b93d81dd
font_01_sfnt_off000078d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D2 9840 bytes
SHA-256: b0c1969bd30f61001e60762f68e74f4a2a224571f319dec2345a0bbb91f99161

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