Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6192a4c8c431fd…

MALICIOUS

PDF

75.0 KB Created: 2021-05-23 08:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 13f476b93c4b1cb5bdb5198ba0be613c SHA-1: b1a3b9dbe1edeccaa7642d8c1d5525aa1aeb23ca SHA-256: 0a6192a4c8c431fdfa1fe87bba68fc976bfdd464fca921bb74e2025f3dd9f0e3
216 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted files, indicative of a link farm or redirector strategy. Heuristics specifically identify a brand-impersonation credential phishing lure for Apple, directing users to a malicious redirector. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

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
  • 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://wadaxoleda.weebly.com/uploads/1/3/5/3/135311928/wewarododel.pdf.
  • 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://jumiwimov.ru/strik?utm_term=learn+how+to+be+a+cashier PDF link annotation
    • https://wadaxoleda.weebly.com/uploads/1/3/5/3/135311928/wewarododel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_602c9ed2c83f7.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/cce8da808.pdfIn PDF document text
    • https://miwomineferele.weebly.com/uploads/1/3/4/5/134514444/46c04ef1f.pdfIn PDF document text
    • https://zekulosig.weebly.com/uploads/1/3/4/6/134689557/5023c122.pdfIn PDF document text
    • https://rewapukin.weebly.com/uploads/1/3/5/9/135961798/zerilob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482012/normal_606dfcbad27c6.pdfIn PDF document text
    • https://gisafumeg.weebly.com/uploads/1/3/6/0/136098567/figaxasuniku.pdfIn PDF document text
    • https://kujedoduzenawo.weebly.com/uploads/1/3/0/7/130776750/3b22bcf6cd275dd.pdfIn PDF document text
    • https://tasukivokojut.weebly.com/uploads/1/3/4/5/134592673/2322730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415748/normal_6003e9b55f4a7.pdfIn PDF document text
    • https://tagasudinabasow.weebly.com/uploads/1/3/5/3/135325797/gasujibiko-sofano-miwogesif-fasekof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493545/normal_6000a4f21f9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448113/normal_601b1022340cb.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/jupevuxirapi/70651469881.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/ropivotadagomoxuna.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/bazuxijofevumijezinu.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/73725568826.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/60655931461.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/vifanibamufeloniporilezor.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/dell_latitude_3490_i3_datasheet.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_off0000e8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E9 5028 bytes
SHA-256: 4e4e88575d3cd0dea409d1b3d69285a0a09dfedc04b03fdaddb1e89c5be8f1fb
font_01_sfnt_off0000fa14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 10820 bytes
SHA-256: 19f6805cdcb323b76031400a8494bfbb94b243c53f2330cc1edcad91983edefd

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