Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1080f7f8911cb98…

MALICIOUS

PDF

65.5 KB Created: 2020-12-06 11:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0ea595520f1d02119b1e47813d69f33d SHA-1: 069eb660bf3a872bc3f04b66488c6bda219417b7 SHA-256: f1080f7f8911cb98df0e484c31cf2207ec721c33e4ff82f56fa8f6c96a582b15
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The document body, though heavily obfuscated, suggests a lure related to a 'Kayla Itsines recipe book PDF', likely intended to trick users into downloading malicious content or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/strik?utm_term=kayla+itsines+recipe+book+pdf PDF link annotation
    • https://vuwugaletop.weebly.com/uploads/1/3/4/5/134588193/vejexoveb.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/nisiwanolom/french_halloween_vocabulary_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9de227-b060-4d89-83e9-1c6aaaa8fe77/91449848633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e63cf2f-eb71-412d-96d3-755621c66b81/68344922903.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/aankh_maare_dj_shadow_song.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/mezido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347bc1da-6d24-4191-8303-182b6e3d185f/nonasiguxulak.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/rafijiwiwerewunujibusiwun.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/41389092023.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/8989544681.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/dasujalexizorexa.pdfIn PDF document text
    • https://passthefeels.wordpress.com/20In 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_off0000c323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC323 5424 bytes
SHA-256: aa43be95c65f4499b13a25acb47572e302a9a2cc8b01e3028098db3c4d0a0b75
font_01_sfnt_off0000d5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A8 10604 bytes
SHA-256: e3362c279726e0794742d865b10f42d23010b5b93c3d0cd5245001dedf7df242

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