Malicious PDF — malware analysis report

Static analysis result for SHA-256 a497e6499eb09a1d…

MALICIOUS

PDF

47.1 KB Created: 2020-10-10 03:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2ce1fbe85358aaff0920f9d852640696 SHA-1: dd1f1527a4ef2ca575840f86b52bcda95838befa SHA-256: a497e6499eb09a1dd410ac4634d48d80cd7c63d63c2a38e1f223958cab45b37f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with the primary URL identified as a malicious redirector. This suggests the document is part of a link farm or phishing campaign designed to lead users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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://gettraff.ru/strik?keyword=jaane+bhi+do+yaaro+mahabharat+scene In PDF document text
    • https://site-1040142.mozfiles.com/files/1040142/26493917937.pdfIn PDF document text
    • https://site-1038583.mozfiles.com/files/1038583/gifemo.pdfIn PDF document text
    • https://site-1038882.mozfiles.com/files/1038882/50337727966.pdfIn PDF document text
    • http://files.cdsscouncil.com/uploads/1/3/1/3/131398385/c8e514.pdfIn PDF document text
    • http://wofipele.theexpatspeechie.com/uploads/1/3/1/3/131381241/rofisejeben-gogumefovot-zusuzuwolujenu-foromudovu.pdfIn PDF document text
    • http://files.clarebcollins.com/uploads/1/3/0/8/130874655/8400e93.pdfIn PDF document text
    • http://files.rachelgreenlab.com/uploads/1/3/0/8/130813796/wababomimaxe.pdfIn PDF document text
    • http://sojexupuf.limaritime.org/uploads/1/3/0/7/130740558/towirof.pdfIn PDF document text
    • http://fosixejen.erinmotel.com/uploads/1/3/1/0/131070227/zubixegumanirow-welomazefid-gedeg.pdfIn PDF document text
    • http://nodoxe.str8coastin.com/uploads/1/3/1/8/131856380/7827670.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/1/0431/0056/9753/files/dell_inspiron_all_in_one_reviews_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/78494309750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/12558229913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8579/1383/files/vw_gti_accessories_2015.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_off00006e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6D 5376 bytes
SHA-256: 3aed7797f8e1e99725963058f079f42164710d4966ab5ade4740707ec17209e2
font_01_sfnt_off00008087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8087 1936 bytes
SHA-256: 73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190
font_02_sfnt_off000089ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CA 10880 bytes
SHA-256: b3779bb6ba6b7b49033d2a52a56c0931f9f5e6feea092c0037bc478a78603c22

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