Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b08d028e73c64ca…

MALICIOUS

PDF

38.2 KB Created: 2020-10-05 05:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 310b70a016a94fb68bc7b147024d2b49 SHA-1: ccb5f311d194cfc708dddc5a7a15c9d73da0f2d6 SHA-256: 4b08d028e73c64ca7a514a3ec4d0b3474bd748a425f378734830d18e36cc47d5
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/strik?keyword=one+less+bell+to+answer+pdf In PDF document text
    • http://tizige.choengmongardens.com/uploads/1/3/1/4/131406710/kasaforaw.pdfIn PDF document text
    • http://garixid.ccequineassoc.com/uploads/1/3/1/3/131384380/kuwofasexuv.pdfIn PDF document text
    • http://files.lizsaare.com/uploads/1/3/1/6/131606396/xereruloxurasilabi.pdfIn PDF document text
    • http://vukonupu.dyakcraft.com/uploads/1/3/1/4/131407535/46465f6a0.pdfIn PDF document text
    • https://site-1040002.mozfiles.com/files/1040002/wepoba.pdfIn PDF document text
    • https://site-1038407.mozfiles.com/files/1038407/96350901847.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/1/0433/4629/6982/files/tiempo_de_llegada_autobuses_urbanos_salamanca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0373/9294/files/jokovisobugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4823/8241/files/90014891052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9721/5143/files/newat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8620/7894/files/tijomat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4405/6473/files/sepewokafibikixupokot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6385/9605/files/estandares_y_expectativas_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1299/files/linear_pair_and_vertical_angles_practice_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8232/4637/files/nipip.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_off000056b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56B1 5292 bytes
SHA-256: 3902fa8281eedaa2197278b4877a04b95a8b2c3ef4e26c447b75205e6747bc47
font_01_sfnt_off000068c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C8 10288 bytes
SHA-256: 8a9e8a3304f0d39a8b17b16be7843f7f1f64e340583250bfd55d0e634908b17a

Open this report in the interactive analyzer, or submit your own file for analysis.