Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97c87df491da2d8…

MALICIOUS

PDF

44.7 KB Created: 2020-10-15 05:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e246785d116485557523108a7cec14a6 SHA-1: 32482e96e427facab2c382e83182f37d27bf5437 SHA-256: f97c87df491da2d8a6447676f5f378c24dc405c44492a69eb5f208596258c6a3
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://gettraff.ru/123?keyword=unir+archivos+pdf+gratuito In PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/gasegajefiw_tazol.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/bazezopid_lokukojakuzi.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/898759b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6229/6220/files/66595577468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9066/0513/files/molarity_of_solutions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8170/4632/files/kaufman_county_clerk_marriage_license.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/38992240264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8453/8554/files/mayella_violet_ewell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5206/3137/files/vutevodumob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3050/9254/files/20833063130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2550/9794/files/how_to_read_micrometer_caliper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9558/0579/files/what_is_the_problem_with_the_church_today.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0455/9519/files/lepesurupogowiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6095/3242/files/46332833307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4062/7614/files/nefivinovagigevisukaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/wobejomilapon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0695/1061/files/69650974026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/dna_molecular_structure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9972/8293/files/shareit_download_apk_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/31268252141.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_off00006004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6004 5200 bytes
SHA-256: cfbca488996ede33bba0bcb9ab325df26481ea64a5c3e5da9e1433a7c5d5d6d9
font_01_sfnt_off000071a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A6 11672 bytes
SHA-256: 75612793b1d23149c954a7b19e5374b0488e895608f0a342a023eef47f3594bb
font_02_sfnt_off00009609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9609 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f