Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ebda25755c3cfd…

MALICIOUS

PDF

48.9 KB Created: 2020-10-03 23:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e6a66e399b1a7cf37717f45052969fa3 SHA-1: 40b634c779b04332a16c7628a2c5995ac4811c74 SHA-256: 88ebda25755c3cfda09453fc3a11e3044fdc0f48697f696bb2dcbfd9751f57bc
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=today+gujarat+samachar+ahmedabad+pdf In PDF document text
    • https://site-1043487.mozfiles.com/files/1043487/tapepegezapigekivu.pdfIn PDF document text
    • https://site-1039644.mozfiles.com/files/1039644/lejubodimamelo.pdfIn PDF document text
    • https://site-1038647.mozfiles.com/files/1038647/zilokuderowalobam.pdfIn PDF document text
    • https://site-1041498.mozfiles.com/files/1041498/pebazobiwagasimosifek.pdfIn PDF document text
    • http://wikegez.happylivingg.com/uploads/1/3/2/7/132740478/xivopexivowab_podawipoli_nexukuvode.pdfIn PDF document text
    • http://files.highaltitudefirearms.com/uploads/1/3/0/8/130814283/63957.pdfIn PDF document text
    • http://files.tonywithers.co.uk/uploads/1/3/1/6/131606490/jalaxifawo.pdfIn PDF document text
    • http://zusudema.mattiafagnonionlus.com/uploads/1/3/2/7/132740228/sukil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3881/8713/files/militant_ordinator_motif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/xujezuxibidebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2005/0855/files/harrisburg_pa_directions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5373/9932/files/6861276161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1719/4650/files/minecraft_too_much_tnt_crafting_recipes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/94606197829.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000660c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 5804 bytes
SHA-256: e853db140af7abeb9c6407de348353453c23dc559ef5ed71865258be011ad494
font_01_sfnt_off000079b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B0 5132 bytes
SHA-256: baa1b1df0bd0dad985606934cf1764c830fe96ed1060d0fe584d82ecb284cfc2
font_02_sfnt_off00008a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2D 14288 bytes
SHA-256: b531a7eea4f117969d711e392139905610d6760aedafaa98f8b7f471c0f527b1

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