Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0dfc2378fda5306…

MALICIOUS

PDF

64.6 KB Created: 2020-10-01 17:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5db238cfac8fdc8dab87f976900e2de7 SHA-1: 7b5da723edb9fd412fcece97ccbf4433359abc61 SHA-256: e0dfc2378fda5306e08c71ed16364ab2d56d78132eef89566f4326bdc2a92d1f
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=the+chocolate+soldier+ct+studd+pdf In PDF document text
    • http://berol.renaissancephoenixptsa.org/uploads/1/3/2/7/132710589/radipakojipinimoz.pdfIn PDF document text
    • http://files.rhpcollegecounseling.com/uploads/1/3/0/7/130739404/jorepujener_zixoligavef_wozepe_xusanuve.pdfIn PDF document text
    • http://files.joeyembers.org/uploads/1/3/0/7/130739084/5601970.pdfIn PDF document text
    • http://files.charhdof.com/uploads/1/3/0/8/130813132/eb5ae928848523a.pdfIn PDF document text
    • http://bosagig.borromeogift.org/uploads/1/3/1/1/131164159/kasejedakilolekowom.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/1/0482/8646/6210/files/wedusubuwemitovukidipemas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2380/5847/files/lee_county_calendar_ga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/wowipoxogudap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/12805403423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d58010d8-4a43-4a9d-ad7e-9e7943bc7042/rukijika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117bcb20-0f22-47da-8c2a-b17950152072/rapoboteli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6889cf1c-b7f0-47c4-a5b5-ad758e2bff44/53820000186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e5c6fa-8209-47c5-a1c7-98b9a7981c6d/nulimimosaroleses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f90058-c5c5-4261-86b7-2aca919b7270/nelowamafukirefirezawusag.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_off0000c0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BC 5192 bytes
SHA-256: d928c927ebba0ba9106c1d5775414ef3bbed5676e95634d2d1c8917b202746c1
font_01_sfnt_off0000d25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25E 10368 bytes
SHA-256: aaae8bf7f863842e53a1fd2da961bac2f18de203a61aa0200194c5f73f7d656d

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