Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64763bceaa5d38e…

MALICIOUS

PDF

49.2 KB Created: 2020-10-02 21:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 747f240a26af79fcc8e57f04c6116571 SHA-1: ed339734412b387da64915570b16e903ef86f522 SHA-256: a64763bceaa5d38e12e4db31f7a289ea1fd0840a8b95231025153695359ffd08
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://cctraff.ru/strik?keyword=carlos+marighella+pdf In PDF document text
    • http://kibufi.livinginalegalworld.com/uploads/1/3/2/6/132680813/5862785.pdfIn PDF document text
    • http://fuxeseni.joachimkoops.com/uploads/1/3/2/8/132814930/1702244.pdfIn PDF document text
    • http://files.oneluventertainment.com/uploads/1/3/1/8/131858353/jiwovepib_sijevamilunol.pdfIn PDF document text
    • http://files.movingmountainsstore.com/uploads/1/3/1/0/131070374/3ba4c.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/silunuk.pdfIn PDF document text
    • https://site-1036796.mozfiles.com/files/1036796/razagoxep.pdfIn PDF document text
    • https://site-1039279.mozfiles.com/files/1039279/basivi.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/zegaranekeril.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/1/0429/8165/4679/files/96782354304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/pixel_gun_3d_apk_download_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6109/1221/files/xusupogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5353/0782/files/vitonadufabokijiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/jaguar_pictures_to_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2740/1368/files/holloway_funeral_home_durham_nc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0060/5089/files/11255691954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/9933/9160/files/cast_of_snl_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/fefefakunajopinififewup.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

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_off00007e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E85 5360 bytes
SHA-256: 1997c5c55c3efbd1d77754e288343682bf3ba8def7805ec5d49af6652f46721c
font_01_sfnt_off0000908f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x908F 11700 bytes
SHA-256: 05ef819a930a967d56dbb2b120e9accaeb4ba377dd6f8dca064e45c531c6a652

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