Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00cd44000ef3050…

MALICIOUS

PDF

71.5 KB Created: 2021-02-11 21:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 72dbb78de6d0ae0a4c476b072e76e32c SHA-1: 0bd0bef664e4ab31676bbf4b071462b6b1128bac SHA-256: b00cd44000ef30508150cba96d5d561c01b3ec348302b5e63cebbb19539d2e25
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=sweaty+taint+meme In PDF document text
    • https://gedinabudi.weebly.com/uploads/1/3/0/8/130814056/505599.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376086/normal_60093281112bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447465/normal_5ff91a1e6780a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462980/normal_60240b4d431a4.pdfIn PDF document text
    • https://rosiruwolokixa.weebly.com/uploads/1/3/4/7/134765588/kanoraruvo-pewidusi-fedokiwo-wugulavano.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/i7hgjfA/silicon_valley_high_school_geometry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_5fe6f58a8b280.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422622/normal_5ff3c7b196bfe.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/3861119.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464878/normal_5fcc8d52924f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wegexaluda.epizy.com/australian_rules_football_team_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/completed_pico_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/bulk_images_google.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/agony_into_the_woods_sheet_music.pdfIn PDF document text
    • http://wurunuj.epizy.com/fovukurerivoduzurisuse.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/14875510546.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_off0000dc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC96 4824 bytes
SHA-256: 5950f1dd6221af4526bcf7bc809bf053c7402a57037cb56e3b30ee660411d18e
font_01_sfnt_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 10652 bytes
SHA-256: 84ca0e18a7cfa910603128e5f1a7e5688733220730f41c067295468c6d176497