Malicious PDF — malware analysis report

Static analysis result for SHA-256 8075e2350c5e372e…

MALICIOUS

PDF

40.0 KB Created: 2020-10-07 15:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: de513da0ad3a2eaae2b4b22ad7abff2e SHA-1: 75f0b12d76f0138ad06bae36eac6915aecd2696a SHA-256: 8075e2350c5e372e749b5d982c117b082a842719e3361e8dcbf5fbd5ed6eedec
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://ggtraff.ru/strik?keyword=choral+music+notes+pdf In PDF document text
    • http://vovibumu.annebagg.com/uploads/1/3/1/1/131163935/foretigugu.pdfIn PDF document text
    • http://pisup.commafultips.com/uploads/1/3/1/4/131454766/edea9d.pdfIn PDF document text
    • http://files.ribreastfeeding.org/uploads/1/3/1/4/131437633/pupoz.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/1/0481/2672/2201/files/honest_starbucks_slogan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/kepakodorajevag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0284/6110/files/spongebob_help_wanted_reanimated.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3880/4648/files/74173373117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9038/6337/files/43782100403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5215/4532/files/mitsuru_persona_3_voice_actor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9558/0579/files/1.5_3_core_flex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3874/2440/files/on_the_aesthetic_education_of_man_in_a_series_of_letters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7362/1154/files/98671729290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/26383741411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5136/3735/files/here_is_or_here_are.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_off00005efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFB 5300 bytes
SHA-256: 335fef3bcc032f74b8710e582b0f0e3eac41bf855c765c952e60a3266d0af75d
font_01_sfnt_off000070ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70CA 10252 bytes
SHA-256: b717c1172cf0b24cea3d43661f17960af16183cc70bbf59227043b1127664050