Malicious PDF — malware analysis report

Static analysis result for SHA-256 8768e3addf4fc129…

MALICIOUS

PDF

65.3 KB Created: 2021-02-20 05:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fbb782c7f00887234c8a895211668b9a SHA-1: 57dc7191633f6be9718b3f1c487660a69852f50e SHA-256: 8768e3addf4fc1297270e2e54800f04c0f225749be5bc9e5c9d5c651653aafad
254 Risk Score

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
  • 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://crophysi.ru/wix?keyword=elm+creek+public+schools+calendar In PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/pozilelisiluvad.pdfIn PDF document text
    • https://gibodogud.weebly.com/uploads/1/3/5/9/135994226/455193.pdfIn PDF document text
    • http://toppiksnack.xyz/jofarofuwadizotas2trjg.pdfIn PDF document text
    • https://mujonuwamuvix.weebly.com/uploads/1/3/1/3/131383921/goreperipa.pdfIn PDF document text
    • http://socialwave.me/zejurusezavamijetufuv5klqo.pdfIn PDF document text
    • http://vinnipoh.space/53444753504uquim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_602253e8675c5.pdfIn PDF document text
    • https://dimafaxatabevex.weebly.com/uploads/1/3/5/9/135991177/suvafigomewak-bobugoxar.pdfIn PDF document text
    • https://tefitosuwit.weebly.com/uploads/1/3/4/4/134478986/5249408.pdfIn PDF document text
    • http://rimka.xyz/1000_questions_for_couplese2fhz.pdfIn PDF document text
    • http://alcexpress1.xyz/64785823901384bu.pdfIn PDF document text
    • https://worejatejele.weebly.com/uploads/1/3/4/0/134095890/fa4fa15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazemi/blown_fuse_indicator_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/graphing_calculator_de_mathlab_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/cs_camera_scanner_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/gifuselafure.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_off0000c059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC059 5472 bytes
SHA-256: eabf31fbd37fd3ca72a5b9f54a83c0638fe3e79e27bc3d05217f17766b4e992d
font_01_sfnt_off0000d2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C3 11516 bytes
SHA-256: 5108bee5983bd165fe11e3242d6c3e7f437f47b07eb19d946c22564a5a7de613

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