Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae953906c6e8fd45…

MALICIOUS

PDF

46.4 KB Created: 2020-10-03 00:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2f8f6ac64ae2cae6f8b32c6708333914 SHA-1: 8b09782f4baa4e180e27d6078f34e4fbb8b1e823 SHA-256: ae953906c6e8fd4559d02a8cf89ab685b2804c31db69c2eba3498c587387d605
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=apostila+panifica%25C3%25A7%25C3%25A3o+senac In PDF document text
    • http://files.lessardvet.com/uploads/1/3/1/0/131070096/539176.pdfIn PDF document text
    • http://files.nightnail.com/uploads/1/3/1/4/131438438/ravipalekigikedude.pdfIn PDF document text
    • http://takim.ravensfellmusic.com/uploads/1/3/0/8/130874317/rinebupupizo.pdfIn PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/28761256168.pdfIn PDF document text
    • https://site-1038299.mozfiles.com/files/1038299/46121313583.pdfIn PDF document text
    • https://site-1039143.mozfiles.com/files/1039143/sasanofenujoregefu.pdfIn PDF document text
    • https://site-1036761.mozfiles.com/files/1036761/19756340140.pdfIn PDF document text
    • https://site-1037860.mozfiles.com/files/1037860/2872560754.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/dutuzaxunevilaxaw.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/85009152714.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/1/0484/7642/2298/files/xonazumeseludisenipet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0136/8743/files/sun_city_palm_desert_golf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2811/9457/files/hard_and_soft_palate_cancer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/chi_nei_tsang_institute.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_off0000723c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723C 5404 bytes
SHA-256: 5ecd08c5bc88642ff2e62c8ecbac77dcfd03a821d6fd194739eca6c6c48e4e1e
font_01_sfnt_off000083db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DB 13488 bytes
SHA-256: fbe63f3d45735e93c442353e47c9758cabc50b808567aeb47eea6e82dd55c917