Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea94022b78d3d0d…

MALICIOUS

PDF

65.5 KB Created: 2020-11-14 09:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 114870b16f5fa708eda324186c86c5b2 SHA-1: e3dfb0241a3b039a7d38e5a06f24ee5bc6b76016 SHA-256: 2ea94022b78d3d0d4b46d23caed0f1fb7cfcc33cc7a339b401d16f570f8c94d2
314 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it is a malicious redirector and a credential phishing lure impersonating Outlook. It links to a known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The embedded URLs and the nature of the heuristics strongly suggest a phishing attack aimed at harvesting user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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://ximazula.weebly.com/uploads/1/3/0/7/130738777/wenawozeviwol.pdf.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://cctraff.ru/123?utm_term=wwwhotmail.com+iniciar+outlook In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f9a20d24c989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f88f285d91bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412582/normal_5f9c0cf7559f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495059/normal_5faefd9568ff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5f9d7a9da3d46.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/wenawozeviwol.pdfIn PDF document text
    • https://leboxinadevot.weebly.com/uploads/1/3/4/4/134440814/wewulowarutugugezona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_5fa5ef0525a8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_5fa7a314ba5b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9930be9-e4bf-4c28-81d7-6a9ea3328568/pojutujir.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/inputs_and_outputs_of_photosynthesis_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc212071-b6af-465f-83b6-a8ebd98f8592/53423902616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e76b64-b1d6-44de-8191-5b47d5f59487/71889437160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e4b097-c6ef-4c8a-9fda-87f76d6eb6d4/2020_mn_girls_state_hockey_tournament.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/minegozavamupowogero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcdb152e-8954-4d82-95ff-cf779776f9c4/free_tv_project_movies.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_off0000c3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D6 5060 bytes
SHA-256: 414eb1bf28e4521909bbc6bd0226b2a2d086686179241d80b98bd62a594c615f
font_01_sfnt_off0000d4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F7 10524 bytes
SHA-256: 1f573eeb4748366ac06d5ddea4b2e12f8f73a471b56a2f7ffa7cf0fdc12c420e

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