Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d0cca72364fab6…

MALICIOUS

PDF

75.5 KB Created: 2021-03-24 01:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 122dfaa00be1a7b0ddc0ff581ce18603 SHA-1: dd66112d09a0fdf44a6b4e3f762ba4866720690f SHA-256: d0d0cca72364fab630076d9bce9f3681b903a97dccaf15f15a5db7d406f8e145
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous external links, many of which are part of a link farm designed to redirect users to potentially malicious websites. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' indicate a strong intent to drive traffic to SEO-optimized redirectors, such as 'https://midufefew.ru/wix?keyword=colette+new+orleans+dress+code'. The ML classifier and ClamAV detection further support its malicious classification, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://midufefew.ru/wix?keyword=colette+new+orleans+dress+code PDF link annotation
    • http://tulavesew.getenjoyment.net/pobumepaxagiju.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/practical_machine_learning_tools_and_techniques.pdfIn PDF document text
    • http://keluzizizeroki.getenjoyment.net/poximiralaralevoz.pdfIn PDF document text
    • https://cdn.sqhk.co/tiluzegata/gcf4hjG/48201339159.pdfIn PDF document text
    • https://cdn.sqhk.co/nanovinojon/didjfgg/98827883920.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_f2a211b6f5b8420188f6c5285c656b46.pdf?index=trueIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_fb666ef574d443bd9adc2e8741dccc1b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sojenozap/blood_bowl_2020_lizardmen_roster.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/64827591811.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/themes_in_romeo_and_juliet_act_1_scene_2.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/56593377871.pdfIn PDF document text
    • http://maxonelotod.epizy.com/used_yamaha_generator_ef3000iseb_for_sale.pdfIn PDF document text
    • https://4b67404f-136a-46a0-9cf3-151f2d38faab.filesusr.com/ugd/241fd5_209a079762694d48a22c83d3967df161.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca1c0f09-a7f3-4a98-aa8b-f9162eb87e05/rainbow_real_life_betta_fish.pdfIn PDF document text
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_31571b6d5134425cac4e03752f940dff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d85cd5a-4de0-402d-962d-65e53518508d/99401776977.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/10982799732.pdfIn PDF document text
    • http://mulotuzasokafo.epizy.com/52769914009.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_off0000ea68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 4932 bytes
SHA-256: 6cf8dcc6f9688b50b9b0210e29179b94cfbbe99edb22dc70edd9b2d597c2fb93
font_01_sfnt_off0000fb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB45 11168 bytes
SHA-256: 65b52ede0aca68a50f790f263906c7129157028a45d8699b3725189f1d825438

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