Malicious PDF — malware analysis report

Static analysis result for SHA-256 c958c78c0d10dade…

MALICIOUS

PDF

71.4 KB Created: 2021-02-21 13:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1e89eb8c8e8bb83d32403d8ebeb9b0d0 SHA-1: d5719d46cf43629952fe0d34777f14f2639fceb9 SHA-256: c958c78c0d10dade057102603ace646cfcf4da2b829b8780821cc370408bb206
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or malware distribution. One prominent URL, 'https://maypoin.ru/strik?utm_term=bible+verse+train+up+a+child+niv', suggests a lure related to Bible verses to entice users to click. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, further supporting the malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://maypoin.ru/strik?utm_term=bible+verse+train+up+a+child+niv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499622/normal_601785e9833b0.pdfIn PDF document text
    • https://zexojoru.weebly.com/uploads/1/3/1/4/131409474/wukipamoga.pdfIn PDF document text
    • https://vanatajeto.weebly.com/uploads/1/3/0/7/130740174/f8a6eeb939.pdfIn PDF document text
    • http://workbykoder.xyz/zaviviteswzv67.pdfIn PDF document text
    • http://covidcapsule.world/71608686966yik2s.pdfIn PDF document text
    • http://simkosa.website/61604983770er6if.pdfIn PDF document text
    • http://fruits-summer.fun/angular_2_template_freeoevib.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/hbURjh3/17424363370.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/aiiibo3/watanigoxulotukaxiluwe.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/jalasilunaz/jurnal_nasional_budaya_organisasi.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/44564026709.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/pasogijozuxaduziw.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/89105989802.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_off0000da47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA47 5412 bytes
SHA-256: 2e42149ad9615dd4c70af708addf8290659ff653050ba655d2220babcceffc1a
font_01_sfnt_off0000eca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA2 10600 bytes
SHA-256: fbb3ded7facd28fe2e953bd4c64628fc2edce007f0eeb5c1e3a8efe234a6025d

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