Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42ac9bd87a008d4…

MALICIOUS

PDF

71.7 KB Created: 2021-02-02 22:57:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b4aeb1189eac7ded3a3a8db559996602 SHA-1: 8d910e2f9d01f6c6f61cf65b834dd21cb9f0c5ef SHA-256: e42ac9bd87a008d458cc68dee7d67fc0645316d08c05754676834d93b028be40
244 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=aplikasi%20fake%20video%20call In PDF document text
    • http://helpcenter.business/harambe_in_heaven_meme_templateasf8c.pdfIn PDF document text
    • https://lobixeximoruse.weebly.com/uploads/1/3/5/3/135319822/8107355.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/U5ANjbG/w3schools_php_tutorial.pdfIn PDF document text
    • http://ygrash.website/ocean_fortune_apkd8uak.pdfIn PDF document text
    • https://cdn.sqhk.co/naketego/aighcgf/download_ball_brawl_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/kokademesuz/bhg4ijp/video_offline_download_free.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/58889e20c801.pdfIn PDF document text
    • https://cdn.sqhk.co/wadalibituge/ieC6icF/blocky_lava_viscosity.pdfIn PDF document text
    • http://wugigazugijub.22web.org/bidimi.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/battles_of_the_napoleonic_wars_timelinevlftt.pdfIn PDF document text
    • https://cdn.sqhk.co/libarazituw/jagjSh5/76224578348.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/hbhbijG/scruffy_dog_book.pdfIn PDF document text
    • http://letilemugemin.66ghz.com/bodaraxakejugovasi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dewelimu.epizy.com/idsa_pneumonia_guidelines_2018.pdfIn PDF document text
    • http://kazigolukujo.epizy.com/sokosifugifugubamuxaj.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_off0000dcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDA 5164 bytes
SHA-256: 9b725ffd7e281d69118a01e497dbbb3cf6e6c68dc9f91f06bb363aba10b8c871
font_01_sfnt_off0000ee90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 10468 bytes
SHA-256: a4783160f49c3416f980cf64ac526540698e5bf0f3162a0bcedfd269809efa20

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