Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a91dee4079b0c3f…

MALICIOUS

PDF

42.4 KB Created: 2020-09-30 04:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: e5f0dfe36cecb2d31bc8778df5373e30 SHA-1: 5d92da6900ff91467209a948d0802e0c76fc721b SHA-256: 7a91dee4079b0c3ff61a3935ee6fec8c7e30090dd1f93a66b565a59eb6bd36a0
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=butterfly+kisses+book+pdf In PDF document text
    • http://dapesob.treenailsoakproducts.com/uploads/1/3/1/4/131438316/4242942.pdfIn PDF document text
    • http://guxexafeg.newbridgepune.com/uploads/1/3/1/3/131380284/bebefebibedijak_rolasokibeboli.pdfIn PDF document text
    • http://files.stevedavisbodybuilder.info/uploads/1/3/0/8/130814510/9a5513.pdfIn PDF document text
    • http://files.kintzmejiaballet.com/uploads/1/3/1/0/131070820/roriv_jolagijofoxu_jerekoburukaj_depamoridikav.pdfIn PDF document text
    • http://files.powerinpresence.net/uploads/1/3/1/4/131453633/3497694.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/1/0432/6051/0376/files/97304486335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9376/7832/files/39253477061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/92615739909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9038/5823/files/download_gta_grand_theft_auto_vice_city_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8152/6176/files/dusuminipifesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0340/7266/files/omaha_steaks_potatoes_au_gratin_air_fryer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/bulofoxigavum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/bacterias_patgenas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/fanipulijumimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/jagesogenozakotupofum.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 5

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_off00006907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6907 5180 bytes
SHA-256: d31de637517776aecc7f8c807447ad7e37d5cedb6455d871a8445498205cc5a9
font_01_sfnt_off00007abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABF 10036 bytes
SHA-256: f51f8b76bb649aa4170818dd916c5962650809ef5b13fa86f93490f754740188

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