Malicious PDF — malware analysis report

Static analysis result for SHA-256 781154fdc3938350…

MALICIOUS

PDF

42.2 KB Created: 2020-10-24 18:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 1031e3db7a5884b65f912c4f8ce1163f SHA-1: cbfe5cf4ab95176d5c9e66e091059fbebaaf6081 SHA-256: 781154fdc393835026f6951ac286081af8ac8ff88ec7d6bc1a30725667525ce3
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://gettraff.ru/strik?keyword=multiplying+polynomials+expressions+by+monomials+worksheet+answers In PDF document text
    • https://juleladenoduko.weebly.com/uploads/1/3/4/4/134478401/xerurimotonojesowim.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/cc4ce4fd64a789.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/lifise_kamujojekal_setakafonevawib_leliledud.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006220.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006220.bin)
    • https://s3.amazonaws.com/felasorarabipis/tipatodipezuniranilobil.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/69012694846.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/apache_license_version_2._0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/7781669452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/one_piece_stampede_release_date_us.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4665/2062/files/natus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8920/8493/files/microbiology_a_laboratory_manual_11th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9891/5484/files/physical_science_college_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/ikea_canada_catalogue_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/kezedezazuge.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/11489257807.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/pdf_of_india_map_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/7400802322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/ventura_high_school_district.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_off00006220.bin)

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 5704 bytes
SHA-256: 97dbf52b5999be0cdcad2c0e27fd430fedd160b9c5d61a087a6b9f7a235e12e7
font_01_sfnt_off00007589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7589 11508 bytes
SHA-256: 53ee44d06763fd2451b3f5ee82d1c3ada7725d348e63e6cf4e5199ce0c9dbd52

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