Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae81b13a3532a715…

MALICIOUS

PDF

83.2 KB Created: 2020-11-22 20:07:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 82c1635a1ce8d99de8654dbbbe406fa8 SHA-1: 959a0cd68ed3ff86f2546462b50a606202cdb18e SHA-256: ae81b13a3532a715e265f5da24f47295b74ae4d1b1dbe975ee420b57557cd4f8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'traffine.ru', which is flagged as a high-risk indicator. The document body, though partially garbled, suggests a lure related to 'top predators', likely a pretext to drive users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=which+of+the+following+statements+is+true+of+top+predators PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/82734179723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f577227d-9cf9-4c00-81d1-ed177e3c4ab4/the_great_debaters_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5bd73b4-9994-4986-93cb-ca5e1e7d8dff/lapawetebavipij.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/60805507441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd09008b-299e-423f-ba00-553453feeebb/asa_made_jugyou_chu_manga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70f2930-8bc1-46d1-9000-c2454aeaa6dd/67926590724.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/mail_format_for_job_apply.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/chris_jones_property_appraiser_escambia_county_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/zukoxelulawafaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b09835-46cd-442b-a633-a3f30532f8a4/13575505999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/616c90d3-c813-4fd8-8b27-0cb65a2b0356/lifeline_home_phone_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/how_to_guide_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f59af2-de4e-4323-9daa-056483898c80/61211409482.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/vuxomemakamuz.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_off0001041a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041A 5676 bytes
SHA-256: 4c577b94d34e723ba4aa9ececb8b0df39bf31bb0d0bff3e67e8ab8d81dbc1ffd
font_01_sfnt_off00011760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11760 12104 bytes
SHA-256: ab4a79bcb4cfe99911c5e2346f730130bf097493c63e6b474e617e761e1c4d7d

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