Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0a0b3dbd8c7a93…

MALICIOUS

PDF

43.1 KB Created: 2020-10-05 20:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 169e8f84a5156db81d2c886aa7ba18a0 SHA-1: e4fdcd329179dd0e21a5a6b942bbf944bebe6528 SHA-256: db0a0b3dbd8c7a93ac97fb0aedd9ab0bb28219e00c312c18cfffdeacd720adca
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=driver+assist+activation+key+free In PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/dudatalilojefumu.pdfIn PDF document text
    • https://site-1038604.mozfiles.com/files/1038604/debulamaxutoj.pdfIn PDF document text
    • https://site-1037005.mozfiles.com/files/1037005/nofoketu.pdfIn PDF document text
    • https://site-1038980.mozfiles.com/files/1038980/81638581086.pdfIn PDF document text
    • http://jikimiw.carpetcleaningmontecito.com/uploads/1/3/0/7/130775048/rirotarafozavodawo.pdfIn PDF document text
    • http://nedidati.moveovermsa.org/uploads/1/3/2/7/132710675/wodakuxewi.pdfIn PDF document text
    • http://labozige.nurseyourtravelthirst.com/uploads/1/3/1/4/131437914/dc8741cd71c3.pdfIn PDF document text
    • http://dadejolu.cavallogallery.com/uploads/1/3/0/9/130969932/lugodiv.pdfIn PDF document text
    • http://files.apexbait.com/uploads/1/3/1/4/131405956/4878675.pdfIn PDF document text
    • http://silur.precinctpowersolutions.com/uploads/1/3/1/4/131406798/2842484.pdfIn PDF document text
    • http://wawel.kellyannecostello.com/uploads/1/3/1/1/131164250/b29fb3126841a.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/1/0434/1409/3986/files/98314113308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/jixifofisudexejiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/73199687144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0605/4559/files/1992613592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3745/7575/files/carne_con_papas_y_chile_verde.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_off00006a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A15 5068 bytes
SHA-256: 081efeebe20967b1274d92b21b217e04153a5d6096eb50b18f3bef121f887b18
font_01_sfnt_off00007b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7F 10552 bytes
SHA-256: 4b5f03d3fa5b096cea5086a3b5266cdc6ac0620e758fafd2aa4afb5a721bcfcc

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