Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad38b5117c22791d…

MALICIOUS

PDF

54.7 KB Created: 2020-09-30 07:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0927008c857e62b174f304660bc45902 SHA-1: 200a4bd063755ce38fc6d836aeb79738f91b9b69 SHA-256: ad38b5117c22791d28e907e060baee3172036571ec834d50485464a032e7c722
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=self+authoring+program+pdf In PDF document text
    • http://files.ggsastrophotography.com/uploads/1/3/2/6/132682039/8906629.pdfIn PDF document text
    • http://pixed.stmarymagdalenewpg.org/uploads/1/3/0/8/130874067/bepijav.pdfIn PDF document text
    • https://site-1037911.mozfiles.com/files/1037911/takatebixasun.pdfIn PDF document text
    • https://site-1036936.mozfiles.com/files/1036936/11697100389.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/lilaxubalivudoxududof.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/1/0434/8634/7414/files/aston_martin_logo_png.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6615/files/35498724481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0385/9103/files/chameleon_run_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5796/1374/files/29513747967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3478/5430/files/38310842915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0133/1364/files/atlanta_symphony_percussion_audition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9034/0766/files/walkera_furious_320_top_speed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1551/0952/files/us_army_truck_simulator_mod_apk.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_off00008970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8970 5264 bytes
SHA-256: 2c54dc103762ff7ae9f55d6e2830f3585ad2420ca0f711c8c8c448f78bdae8f8
font_01_sfnt_off00009b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1F 10652 bytes
SHA-256: 51d23f8c3e2f0f31136f662009afcd8ca9a6d7512d187fbae85f1c1f70c767b6
font_02_sfnt_off0000bf84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF84 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2