Malicious PDF — malware analysis report

Static analysis result for SHA-256 f857d9bffdd8d093…

MALICIOUS

PDF

138.0 KB Created: 2021-02-18 10:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4ec2870d5c61530b37e1df09ebec2035 SHA-1: 33129b18d2494a2e839b125c0f825c4cada7fc2b SHA-256: f857d9bffdd8d093e19de2ac10186c146146a80533f1ba0ce21cf38dfcfd34b5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. One prominent link, 'https://seumenha.ru/wix?keyword=maytag+centennial+commercial+washer+owners+manual', is presented as a manual but likely leads to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/wix?keyword=maytag+centennial+commercial+washer+owners+manual PDF link annotation
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/wetoxosid.pdfIn PDF document text
    • https://ramageputa.weebly.com/uploads/1/3/1/6/131637054/9927126.pdfIn PDF document text
    • http://clipshd.design/a_zebra_in_lion_countryfyzqv.pdfIn PDF document text
    • http://piredvizhnik.com/gitumikifaxewebuxofapesokrowgx.pdfIn PDF document text
    • https://mirivibi.weebly.com/uploads/1/3/4/2/134234555/3aa7c.pdfIn PDF document text
    • https://gajegebukorivip.weebly.com/uploads/1/3/4/4/134487765/kedane.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/motametanunigitob.pdfIn PDF document text
    • https://dinamulu.weebly.com/uploads/1/3/1/6/131637284/dobapuzadabaxo_suvevat.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/772e4f.pdfIn PDF document text
    • https://zirivuso.weebly.com/uploads/1/3/1/1/131164479/1686268.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/dafumuxitupav/acer_stock_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/ey_indirect_tax_guide_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/18277970067.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/29379857549.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/raees_movie_trailer_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/dorafabiti.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB2B 11712 bytes
SHA-256: 0f492b2085a73a293246d7b282ddb785519c4c4c619b82bb2e3316c902213451
font_01_sfnt_off0001e17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E17E 5412 bytes
SHA-256: 24e0ee2fb104db689cec26ed03680f0c89764297ff500869b4b83aa7ae29f8a2
font_02_sfnt_off0001f3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F3E0 11004 bytes
SHA-256: c986a778578beb5fc20ca3b0d1aa742f8976e747effe7a3832b293db4cc1d0e5

Open this report in the interactive analyzer, or submit your own file for analysis.