Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ade1a1b285c2389…

MALICIOUS

PDF

67.4 KB Created: 2020-10-05 15:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ae0ebd33dbdf8cf6fcd9fb56a19dfcba SHA-1: 000b10be020331e9aa0f76399b413cec192e320b SHA-256: 4ade1a1b285c2389adeca119b0749beb4890803a0a7232fc2794f82b222d51ed
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/strik?keyword=testere+di%25C5%259Fli+aslan+pen%25C3%25A7esi+kullananlar+kad%25C4%25B1nlar+kul%25C3%25BCb%25C3%25BC In PDF document text
    • http://vezesi.helpinghandsrescue.org/uploads/1/3/2/8/132815806/dizaku_webeto_dimokekipune_tones.pdfIn PDF document text
    • http://files.seetheworld.tours/uploads/1/3/2/8/132815961/bawifutopite.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000affb.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000affb.bin)
    • https://uploads.strikinglycdn.com/files/1797c605-2e5f-43ba-b89c-1859ddcb1a53/kibebukidusalesikar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a01c8d3-af32-419b-b34a-70b823711b90/14861713565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b4d58f9-747f-4321-b516-9a6cfba9cd95/62809840127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8266875-d7cf-47d9-b0e8-0add6e8782d4/tisikepemuwadibujojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/46130585472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3439/6830/files/65514254196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4007/4647/files/bright_college_years_youtube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0044/2275/files/kojolelogotigezizedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6534/4935/files/11216912435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/9907/7016/files/the_magic_years_download.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 extracted file (font_00_sfnt_off0000affb.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000e789.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000e789.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000affb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFB 5688 bytes
SHA-256: aa32fd6525156a70377d4651e34d742e8f196c10bf9ff13e6903531be51ac479
font_01_sfnt_off0000c275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC275 11968 bytes
SHA-256: 0c235c29d5b6553fb02a673d3ff27293144261b0e1304706ccf770ea1edf4a32
font_02_sfnt_off0000e789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE789 16384 bytes
SHA-256: f53b43e12006e3d52612f085e6e184fa5bba3604999f0cb64562e6bb996dc06b

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