Malicious PDF — malware analysis report

Static analysis result for SHA-256 36afd8d7af7b2912…

MALICIOUS

PDF

40.7 KB Created: 2020-10-01 20:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6ff50681924eb1900fb3180520fc6466 SHA-1: 367d8bc9451533156218c52fbc7706b1b47147c2 SHA-256: 36afd8d7af7b29129d01f6d38c21c9783d2dce3badc6ab5db86869f71a1bdca7
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=canon+lide+110+scanner+pdf+driver+free+download In PDF document text
    • http://files.littleegyptlyceum.com/uploads/1/3/1/4/131437924/fesipemumeda.pdfIn PDF document text
    • http://durow.riveflowyoga.com/uploads/1/3/1/4/131454950/buzifusalatapos-zeliwirabejepe-fepemaletotedet-gupozitoxuwep.pdfIn PDF document text
    • http://files.nativetales.com/uploads/1/3/1/6/131637209/fegaputefisijob-rivuzozutek-fularemelux.pdfIn PDF document text
    • http://files.learningpublicsafety.com/uploads/1/3/0/9/130969545/8884507e.pdfIn PDF document text
    • http://files.saphotoservices.com/uploads/1/3/0/7/130739204/wunejaw.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/1/0433/8565/1358/files/understanding_american_politics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/93852018273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/rarizonimemeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2983/5161/files/kabazejavifanewinosas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7642/2298/files/21506178779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/jisakoreferakapadizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0829/8655/files/foil_stamping_machinery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4706/7041/files/alchemist_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5588b155-55c7-4fde-94fd-37b6d15f371b/66498102231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0b691e-0fe6-4c80-811f-f2187769d133/zulas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9416298-d43f-4f38-8abe-339a64802e1d/85678763168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86764cbc-574d-4aed-8484-ebcac0f7cada/35224245.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_off000060bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 5400 bytes
SHA-256: cfba5d3d7c3bad7aff8b52e43e7e0e7f4de3bc619244ff09cccfab4363da1dac
font_01_sfnt_off0000733c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x733C 10084 bytes
SHA-256: 13cec4bade70b7f1fbdfc29b60f27c4e23f4792b37a30844e6132ace429129f3

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