Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a3f7964b9fe574…

MALICIOUS

PDF

71.7 KB Created: 2021-02-24 22:02:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 44d7fea26583f605a852279c3c7aa1e7 SHA-1: 87dca1c69a46044f7f7632703b5a5425688a1907 SHA-256: 66a3f7964b9fe57403c5b7f7ba99733cc008b8368e8c6c78e53e6838fab59e35
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://seumenha.ru/wix?keyword=north+carolina+biometric+privacy+law PDF link annotation
    • https://bejolikide.weebly.com/uploads/1/3/1/4/131437094/a6c7571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5fd318a870de5.pdfIn PDF document text
    • http://gewarum.66ghz.com/illustrator_change_default_template_folder.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/sda_hymnal_free_download6zlzv.pdfIn PDF document text
    • https://wosiwimobej.weebly.com/uploads/1/3/1/1/131164223/9bec5976f1b23b.pdfIn PDF document text
    • https://xejuxomezul.weebly.com/uploads/1/3/1/6/131637030/wavitinobonojagep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_5fce976cce941.pdfIn PDF document text
    • http://sedouche.xyz/mirilamatojepibimun6ho3b.pdfIn PDF document text
    • https://valezofijamope.weebly.com/uploads/1/3/4/4/134445284/lipavazakuf.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/wisaxanasakazojuwus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugiwixet.epizy.com/nifem.pdfIn PDF document text
    • http://kodexogezetegir.epizy.com/all_cg_song_new.pdfIn PDF document text
    • http://kijemuf.epizy.com/jevusizaxoson.pdfIn PDF document text
    • http://kesajuwigiferu.epizy.com/cambatta_camballah_album.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_off0000dc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7D 5356 bytes
SHA-256: 52795b52ca12d7ee5f0bf9aac266277231e66c4223f2eb6e6b4c59f960bed05e
font_01_sfnt_off0000eea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 10344 bytes
SHA-256: a47cf6fc22ef436781efdff77aa3c44ffbdde9086e9028bd08194ac4694df55e