Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b63a72412721c7…

MALICIOUS

PDF

47.9 KB Created: 2020-09-30 17:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 836945adf5135b5c1b401abdbc1bf21e SHA-1: 2defc34ec8990b8780fc20f16a1cf3001242a2a0 SHA-256: d3b63a72412721c7d730d005bf5dba5366843fe20e654b6f918b2c39ef0866d3
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/strik?keyword=meiosis+1+and+meiosis+2+worksheet+pdf In PDF document text
    • https://site-1036711.mozfiles.com/files/1036711/suzeralibu.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/desijagozagize.pdfIn PDF document text
    • https://site-1037227.mozfiles.com/files/1037227/suxosid.pdfIn PDF document text
    • https://site-1037044.mozfiles.com/files/1037044/vewezu.pdfIn PDF document text
    • https://site-1037075.mozfiles.com/files/1037075/wetavot.pdfIn PDF document text
    • http://files.nowwelive.com/uploads/1/3/1/4/131483440/d1fe67fbaae4b7.pdfIn PDF document text
    • http://files.bsklartherapy.com/uploads/1/3/0/9/130968933/251dc0.pdfIn PDF document text
    • http://nalug.davidcareyimages.com/uploads/1/3/2/6/132682233/jeberomumapafesav.pdfIn PDF document text
    • http://kilojez.ovalaboratories.studio/uploads/1/3/0/8/130874455/5501666f832f407.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/1/0437/1732/9064/files/high_performance_cluster_computing_rajkumar_buyya_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8788/3165/files/inheritance_book_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/4470/5180/files/65800785212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9841/5010/files/computer_hardware_skills_to_put_on_resume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e90e411-eac3-4c8b-b4f6-3dc7f27dabe6/rixejesad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3693b598-70ba-4032-ac5a-819abefa9c0f/vutozebetezutolomoredokaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ee08b1-905b-4476-95fe-946f3c36efb2/89981662782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5bbd6a-75b5-407e-9c7d-a67e8c05a6b5/mudosubemeguzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e8ed87-6f59-4ed0-bbb9-067e601fde6a/13002191619.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4A 5384 bytes
SHA-256: ce6a69d62fedbb3305bfdb2e69a7e495d1604d5de6d5b97ea61369ef48d0704e
font_01_sfnt_off00008084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8084 10424 bytes
SHA-256: 085ecbdc747800a4311d59c9ccf3bcb4cd29ee85706c02f8dd9651a3f34ff4d5
font_02_sfnt_off0000a3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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