Malicious PDF — malware analysis report

Static analysis result for SHA-256 5619fda2e76d34a1…

MALICIOUS

PDF

39.5 KB Created: 2020-10-10 11:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 37b3f49f9445ad3d72a70288713992b7 SHA-1: 2ac2700b9a2c568d74b4869e69e6b3905ebd1991 SHA-256: 5619fda2e76d34a164b0d36c1761de817cf68a9fa9872fd216d22b65ca13988d
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://ttraff.link/pify?keyword=plaque+of+the+ergastines+khan+academy In PDF document text
    • http://regazafes.georgepagliero.com/uploads/1/3/2/3/132302772/rigulawarax.pdfIn PDF document text
    • https://site-1038427.mozfiles.com/files/1038427/39240349772.pdfIn PDF document text
    • https://site-1036626.mozfiles.com/files/1036626/53328824195.pdfIn PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/zozudozefimin.pdfIn PDF document text
    • http://files.coresporthorses.com/uploads/1/3/0/8/130813417/fiwijoxotok.pdfIn PDF document text
    • http://files.aspa-tec.ch/uploads/1/3/2/7/132740654/xifalig.pdfIn PDF document text
    • http://files.mdhawaii.org/uploads/1/3/0/7/130775200/5911371.pdfIn PDF document text
    • http://bogor.wmalumniweekend.com/uploads/1/3/1/3/131379608/5993092.pdfIn PDF document text
    • http://files.joanieyanusas.com/uploads/1/3/1/8/131871484/dujelegofogi.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/1/0428/9472/1187/files/nitori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7934/6592/files/bissell_powersteamer_proheat_plus_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6348/7897/files/tulivibimazokanul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7938/4734/files/wonedixilolepado.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_off00005ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB2 5728 bytes
SHA-256: 31f0b7556b8a1037817f8af9ad9fd501b8c6cbeb2d7ea2fe806e85d4ea2c99c4
font_01_sfnt_off00006e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E07 10340 bytes
SHA-256: b9fce2f2bdd3c52d554883c75ff8e6b1b3585622155b2a8056108a0bf6725ae3