Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec91c8c386fa52a…

MALICIOUS

PDF

77.3 KB Created: 2021-02-19 22:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5cb9cafffd7c1ab1ccc0a381133980a4 SHA-1: 117d7999dc64c42ec7cb49f0108285328cd0faf5 SHA-256: 3ec91c8c386fa52a2cc0231da66a4059ffa9696ef6cf73fac43361e0f75c77fe
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://crophysi.ru/wb?keyword=the%20giver%20chapter%209-13%20summary In PDF document text
    • http://istlan.space/194910339798k1fr.pdfIn PDF document text
    • http://intekzafast.online/bedwars_server_address_java_editionxkkiw.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/c2jgohi/vawobekepoxogisedivoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/hieHuhi/fear_the_walking_dead_season_10_netflix.pdfIn PDF document text
    • http://shop-onlain.fun/totally_accurate_battle_simulator_free_download_apk_pculuut.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/gN7PhHq/xeputowalen.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/hcpji1p/make_a_list_in_r_markdown.pdfIn PDF document text
    • http://nonly.xyz/rokebusageduwuverutogoky92u7.pdfIn PDF document text
    • http://nibelv.xyz/bawebidezeroked0yds.pdfIn PDF document text
    • http://4escam-bot.online/riwobajaxapazu59rbi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fimogaselan.rf.gd/sazuxutet.pdfIn PDF document text
    • http://dimuwebogikufuf.rf.gd/annexure_c_form_111.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/who_invented_mathematics_first_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/tivim.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/lotuf.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/certificate_of_origin_form_dhl.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/sociology_of_health_and_illness_behavior.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/eastern_montana_guided_elk_hunts.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_off0000f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 5832 bytes
SHA-256: 6e5e36a49b52d9ed07524e81d24b9533b27c11dfe478dddb205d8446b21d2353
font_01_sfnt_off00010617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10617 9996 bytes
SHA-256: 65fcf487a8096dfca71f22469c3729771d15ee3cee2552fd8a24562b856a8f82