Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bd275ccd3f168f…

MALICIOUS

PDF

48.2 KB Created: 2020-10-25 22:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: db419fa0bcef192b0318b6f6930caf5e SHA-1: 1d71908e8394a9863e0a11f7f36cd0b8ee71db62 SHA-256: 83bd275ccd3f168fab93d6c74396797ca4680f265067ea0318f0bd2816222305
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://cctraff.ru/aws?keyword=the+weight+of+glory+pdf+cs+lewis In PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/fb383ccaee2b91.pdfIn PDF document text
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/6967509.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/24132990f2de0a.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/1/0437/2286/6837/files/18262577460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6080/4770/files/40339129916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7378/1408/files/94469046199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7446/4160/files/chicco_cortina_keyfit_30_travel_system_stroller.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8021/3170/files/credit_appraisal_literature_review.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/37908493774.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/wabanoxosujofumukozus.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/cricket_darts_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/48718967538.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/37009297994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb134be8-3d3e-4735-a13b-6bc9da6b0f31/nuwiwepunetuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c6d1d9-d9b0-4771-908b-0ac75c0c4214/gadulirevuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f66c444-d2e7-4617-bfad-65f61febc33d/ketaxavetebolonudez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20294f71-6af4-4579-8614-17a646349a4d/80673881108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2565/0592/files/paytm_mall_app_download_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1791/4533/files/gidepanimexoligiganovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4500/2657/files/angle_of_staircase_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6972/7415/files/best_vpn_server_address_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6698/5122/files/gadojepunezeteluvede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1881/6157/files/38046013187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/jozamijamor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7174/1338/files/camera_fv-5_lite_pro_apk_gratis.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_off00007899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7899 5348 bytes
SHA-256: 9ef4519cea6eaf2782f67c4dcac555533e4d816e42f34b89e45bec74ab637100
font_01_sfnt_off00008aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEB 12176 bytes
SHA-256: c81479a470abf96481adb61ccbe7ce2815406ecefdadbe773d25e599d8826704