Malicious PDF — malware analysis report

Static analysis result for SHA-256 76874da0f0adbab6…

MALICIOUS

PDF

55.8 KB Created: 2020-10-01 01:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 57a86cafd69c58101a4a5362b7f4cd07 SHA-1: e65ac8eafff796d805324942b59e2f8d209b9f1d SHA-256: 76874da0f0adbab6bc8abc719bdbeaf451442906249d8524cea3624fcea36be9
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=physiology+of+coronary+blood+flow+pdf In PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/69778368637.pdfIn PDF document text
    • https://site-1039421.mozfiles.com/files/1039421/dexajelegaj.pdfIn PDF document text
    • http://files.exilesbazaar.com/uploads/1/3/0/7/130776183/514845649f531.pdfIn PDF document text
    • http://files.vibrant-energies.com/uploads/1/3/0/8/130873907/nomadu.pdfIn PDF document text
    • http://files.kolonius.com/uploads/1/3/1/4/131437393/afd50d5.pdfIn PDF document text
    • http://gevotozed.discoverohiopyle.com/uploads/1/3/1/6/131637291/dccae3ab3afaae8.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/1/0430/6518/0314/files/27056352370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9809/5262/files/79289112874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/best_target_acquisition_sniper_destiny_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/zupikofaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7868/3298/files/instruction_manual_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/heart_attack_telugu_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5928/1048/files/bootstrap_template_profile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/76293376067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/54315149813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0753/3475/files/earthquakes_and_seismic_waves_worksheet_answer_key.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

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_off00008611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8611 5752 bytes
SHA-256: c21202ce27ad6c2f79633cc7352e219be353081b649db515e367c8791dbb1720
font_01_sfnt_off000099ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99BA 10084 bytes
SHA-256: 851b3ffa4ff7e80cf6b7777c4203b76d231beb2f0e80e4bc50a4363bd17e3f06
font_02_sfnt_off0000bc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5E 16148 bytes
SHA-256: 49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648

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