Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6f792aa558907b…

MALICIOUS

PDF

80.1 KB Created: 2021-04-08 04:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 887fe0fb02399c020c83822ddb629aa7 SHA-1: 3390fd02bc80b8d355bc06557f90868616eb2d14 SHA-256: 7f6f792aa558907b80fe43a959f2bf560af9c62a6dae871127f4b888ee61dbd7
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains metadata related to 'brand guidelines templates bundle', which is likely a lure to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/123?utm_term=brand+guidelines+templates+bundle PDF link annotation
    • https://zozufawagizawag.weebly.com/uploads/1/3/4/4/134454621/girisunemawevagimixe.pdfIn PDF document text
    • http://kolekewoni.mywebcommunity.org/43204819525.pdfIn PDF document text
    • https://bazitakitavame.weebly.com/uploads/1/3/5/3/135394276/345b3c.pdfIn PDF document text
    • https://duwujesipegon.weebly.com/uploads/1/3/4/8/134883919/8705454.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/38491260339.pdfIn PDF document text
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/7087284.pdfIn PDF document text
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/nepewukesiwut-rixalarokaligu-gewejijapi-balesozekom.pdfIn PDF document text
    • https://sukurexu.weebly.com/uploads/1/3/0/9/130969838/kigeviwomumi_nizefugoxi.pdfIn PDF document text
    • https://ligotexodov.weebly.com/uploads/1/3/4/4/134488860/6340060.pdfIn PDF document text
    • https://febelozo.weebly.com/uploads/1/3/4/5/134599394/vilas-vipufesirizuliz.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/2d26f41c53.pdfIn PDF document text
    • http://jidudilubad.mygamesonline.org/zibewobiwobi.pdfIn PDF document text
    • https://nazuvunu.weebly.com/uploads/1/3/4/4/134438845/joxipebulewog.pdfIn PDF document text
    • https://mulevemi.weebly.com/uploads/1/3/4/7/134754511/36db52f78afd9f.pdfIn PDF document text
    • https://movalibixijol.weebly.com/uploads/1/3/2/6/132682530/3912766.pdfIn PDF document text
    • https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/12da3f00c9304.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_0f326186142542babc531945bdada609.pdf?index=trueIn PDF document text
    • https://e7e1611e-f78d-4dfd-b5ce-3be5f579732f.filesusr.com/ugd/4b76a6_b322b1614e7746aebc937ce7a598dab4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/strategic_management_models_and_diagrams.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_f06236fa8d644a308486c2a23435e9b0.pdf?index=trueIn PDF document text
    • https://2e21b658-2967-4279-8f18-a03590b678a5.filesusr.com/ugd/f5e1b2_b9e6a666611f4c11b57f1469b7363c7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvarelo/what_are_the_three_layers_of_a_rainforest.pdfIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/vaduxegigisuxojuwanulo.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/vadudidowugo.pdfIn PDF document text
    • https://115777a2-cc0e-4789-9e99-30cf4bdfca1a.filesusr.com/ugd/2b3546_2e848193e33c421887d83045b130805f.pdf?index=trueIn 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_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 5468 bytes
SHA-256: a55bc7b05459cbee97ef9d43362968eb2a52ef457be67d57756ac49d97b28e15
font_01_sfnt_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 2344 bytes
SHA-256: 00c8224ad94e87a3fb90ca40daa9abd28df88246dcc9e7f220b4441c89c5043d
font_02_sfnt_off00010ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB7 11200 bytes
SHA-256: 47f14f756f24447e204ef5af847b3184d89579fdc11147dbd8543c9ac3b4c0e8

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