Malicious PDF — malware analysis report

Static analysis result for SHA-256 5887edc42d98438e…

MALICIOUS

PDF

79.7 KB Created: 2021-03-29 03:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf4af806d6569e1d01a55059d5e717b0 SHA-1: 1f40cc8ecf11ab8cea1d6941e7251bc5adb58e10 SHA-256: 5887edc42d98438ec11cd273f1885a7b8956d367d3c9e95e47f17b599f65b5b9
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the overall structure suggest the document is designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/wix?keyword=i+saw+it+on+tv+meaning
    • https://static.s123-cdn-static.com/uploads/4450158/normal_5fdff62c4f451.pdf
    • http://gebikomuxe.getenjoyment.net/yasin_dalam_rumi.pdf
    • https://cdn-cms.f-static.net/uploads/4368949/normal_6044967bbda49.pdf
    • https://vuzodafolo.weebly.com/uploads/1/3/4/7/134732359/b062a42bf185.pdf
    • https://kijapadawoli.weebly.com/uploads/1/3/4/9/134900431/wakebozarumunodo.pdf
    • http://ramifapufebi.scienceontheweb.net/46401203280.pdf
    • https://taxubixud.weebly.com/uploads/1/3/4/7/134760406/b5528a7046662.pdf
    • http://wotidoteked.mywebcommunity.org/gesowusolasezusebotivipi.pdf
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/puzalopimis_vejozoribad.pdf
    • https://static.s123-cdn-static.com/uploads/4419191/normal_5fc5cae915a4b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ae856ecd-12f6-43c4-ad0c-6673e30d0339/11819349544.pdf
    • https://uploads.strikinglycdn.com/files/9a880c11-0f72-49a6-960f-7a90db4b92ff/1790561076.pdf
    • https://s3.amazonaws.com/lawakux/zuvixivenigedufin.pdf
    • https://uploads.strikinglycdn.com/files/dcaa396d-55a4-4635-94da-730be28f988e/kopabawebuki.pdf
    • https://uploads.strikinglycdn.com/files/7cefad14-69fd-4a12-aca7-953615cd4993/53552073906.pdf
    • https://s3.amazonaws.com/tafogusegabomu/mugimadenodetituvibol.pdf
    • http://jenotuxeje.onlinewebshop.net/93096650461.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb05.bin
19f7cc0b45896d62613be2fd10a1634e09f45bbc65e7709cf07eca875e58674e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 4968 bytes
font_01_sfnt_off00010bf7.bin
6457afc0bfdb44647281ba78f703790f3a69c4ac1a38a887df6f61098a9a8561
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF7 11428 bytes