Malicious PDF — malware analysis report

Static analysis result for SHA-256 9892a074d047b621…

MALICIOUS

PDF

36.0 KB Created: 2020-11-07 21:29:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 2c2dfd0bb0fe3b804b717af0e3d588b0 SHA-1: ca716acb8509366c1415cd1a1ad7a93964cf503d SHA-256: 9892a074d047b62182d736118a283b360d5491393fa2bb75b9403eb1d3012fd6
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://traffking.ru/123?keyword=onn+32+inch+led+hdtv In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_5f977a2d6c4d6.pdfIn PDF document text
    • https://vifedunujaxali.weebly.com/uploads/1/3/4/3/134398483/pumobosixunedaxo.pdfIn PDF document text
    • https://lavuzolitad.weebly.com/uploads/1/3/4/3/134327879/kakawusamakelewuw.pdfIn PDF document text
    • https://rekubiregidejel.weebly.com/uploads/1/3/4/4/134464182/xewukaguwasuju.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/kubuvevizabibujaz.pdfIn PDF document text
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/jukar-nepuzi-zonuduxoxewod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bigibali.files.wordpress.com/2020/11/download_8_mile_full_movie_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/juvunikumon.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/jean_anouilh_medea.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/structure_of_diamond_and_graphite.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/xenujediridikegagafulimu.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/27124987682.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/arduino_mega_2560_pin_diagram.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_off00004c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C59 4924 bytes
SHA-256: f0c2df93b112d740382790f67e6ecd8ace4442f02dab1f89d7248f71a8557450
font_01_sfnt_off00005d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D24 11272 bytes
SHA-256: 5b09f700ecd0cd43fd95d6f10d5c824832ee22dff8b24c191a7f2a30a5817bed