Malicious PDF — malware analysis report

Static analysis result for SHA-256 684d1365119a583e…

MALICIOUS

PDF

67.2 KB Created: 2020-12-24 14:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ceacf8e705669740f5dc68d7129c1990 SHA-1: 24a72e8740cf0b9db61599c15a7c70fceb4fbb52 SHA-256: 684d1365119a583eecb85c7e03119924e4fb3c0389f6583fd01152160ec206ed
274 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with several pointing to known malicious redirectors and phishing lures. The 'SE_BRAND_CREDENTIAL_PHISH' heuristic specifically identifies an Apple impersonation attempt using a malicious redirector. The 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics further confirm the malicious nature of the embedded links, indicating a phishing campaign.

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/05e94b159a75c.pdf.
  • 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://traffking.ru/strik?utm_term=jibjab+trial+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f9264a9297d2.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/ggZgfP9/lilosafobenuwaturew.pdfIn PDF document text
    • https://cdn.sqhk.co/mozopojugode/jaOhaih/patoratufigupobegalejiw.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/05e94b159a75c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388274/normal_5f9146584b6a7.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/juwasuvutuxejaf-nutumefagemilak-voduvivotu-robiledajolaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426945/normal_5f9a19e9933c6.pdfIn PDF document text
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/zefokekulurobabamu.pdfIn PDF document text
    • https://vabemeraronoj.weebly.com/uploads/1/3/1/4/131452983/2024653.pdfIn PDF document text
    • https://cdn.sqhk.co/sevimifogu/fii2Fhf/sowovumewineveb.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/pesetufavo/bifujobibap.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/pilokemozizodefifesa.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/xudonebu.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/google_calendar_printing_format.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/mac_os_x_catalina.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_off0000cb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0D 4980 bytes
SHA-256: 833b29871680c8eea1298ec3c1f789db85324a0e5ccd10abc08cebebac6e588c
font_01_sfnt_off0000dc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0D 10628 bytes
SHA-256: 6dbc28d3b913066d7adaf301a1eff540e065833df3be0bada9ff4c0aec58e782

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