Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d011425acaafbcd…

MALICIOUS

PDF

108.2 KB Created: 2021-06-03 15:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a358541efd7a088bb063ec2c7210612d SHA-1: de77b747f42f4991e1576c64e5d3e029b215c37e SHA-256: 7d011425acaafbcd3072b8bf2326df3add5744cd685ec733f77b6a2e6d3c0dc2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to file-sharing services and link farms, indicating a phishing or scam attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or credential harvesting. No scripts were extracted, but the presence of many external links suggests the document's primary purpose is to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://irlanc.ru/pbw?utm_term=how+to+update+tomtom+europe+maps+for+free
    • https://cdn-cms.f-static.net/uploads/4460233/normal_6033f58d43ddc.pdf
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/tenofejekosagosuxup.pdf
    • https://cdn-cms.f-static.net/uploads/4365589/normal_6052fba10218a.pdf
    • https://jurarolo.weebly.com/uploads/1/3/4/3/134351512/kapobadonunodobupofu.pdf
    • https://static.s123-cdn-static.com/uploads/4491157/normal_5fe567b550685.pdf
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/7384396.pdf
    • https://pixijitawe.weebly.com/uploads/1/3/4/5/134593468/gusuxebitelewutivot.pdf
    • https://cdn-cms.f-static.net/uploads/4386618/normal_605f9593bcbe4.pdf
    • https://xojovirasada.weebly.com/uploads/1/3/1/6/131637125/lorapulejodagan.pdf
    • https://cdn-cms.f-static.net/uploads/4475738/normal_602b8537387e5.pdf
    • https://nosodawef.weebly.com/uploads/1/3/4/6/134693330/zabexizipun_fasan_zerupan_kexikateluxiwuf.pdf
    • https://kenomipijisax.weebly.com/uploads/1/3/3/9/133986884/joxeruxejo.pdf
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/4539822.pdf
    • https://static.s123-cdn-static.com/uploads/4453337/normal_5fc9f514c185d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kokoxudalux.pbworks.com/f/nedira.pdf
    • http://kunozulig.pbworks.com/w/file/fetch/144545997/29702092439.pdf
    • http://garifukedako.pbworks.com/f/gta_liberty_city_stories_psp_iso_download_free.pdf
    • http://dekokos.pbworks.com/f/33807703083.pdf
    • http://sijomirurefi.pbworks.com/w/file/fetch/144451791/64805693015.pdf
    • http://wemilamozede.pbworks.com/w/file/fetch/144539637/razumiduwisibujoziko.pdf
    • http://zorisomofi.pbworks.com/w/file/fetch/144552510/nagupozawizubuki.pdf
    • http://rimikupababo.pbworks.com/w/file/fetch/144535848/25192434065.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_off00016938.bin
d01845e11875e63092287132a363317213ddecbecf0d47074ec2e6199ba0f0b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16938 5208 bytes
font_01_sfnt_off00017ae8.bin
4e279afd2d5ae29567b297851170a4abecd1a3d9d04ac11ee2e612d720a9c8ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17AE8 11788 bytes

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