Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9eb4ec26a67347…

MALICIOUS

PDF

85.0 KB Created: 2021-03-28 10:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d80d80d6dd1d22e82252167dd7bd7118 SHA-1: 704dfa1834bac4e0c075697c39d12cfa40ff7b02 SHA-256: 4d9eb4ec26a67347acbbb6905ef773760b436b03c62857a9e7d3dc8c0409ea07
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan variant. It contains a large number of external links, indicating a potential link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest it is designed to redirect users to malicious sites, possibly for credential harvesting or further malware delivery.

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://mezovuduw.ru/award?keyword=itsy+bitsy+spider+lyrics+pdf
    • https://kunagotuj.weebly.com/uploads/1/3/0/7/130739098/37219.pdf
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/gavebufiwaku-jedafefevoka-nifoxovazizepi-mafutezajefu.pdf
    • http://mevukavotidu.getenjoyment.net/77249269192.pdf
    • https://xugugizebe.weebly.com/uploads/1/3/1/4/131482894/nonud.pdf
    • https://memozarukun.weebly.com/uploads/1/3/4/3/134378051/kimajero.pdf
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/gedajasi.pdf
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/d652090bec1.pdf
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/xuzudo.pdf
    • http://lodomujimujug.mywebcommunity.org/fender_super_champ_x2_amp_model_list.pdf
    • https://kivinogafuwej.weebly.com/uploads/1/3/4/7/134702495/347558.pdf
    • https://virobejiku.weebly.com/uploads/1/3/5/3/135324848/8e546d5d6a1207.pdf
    • https://cdn.sqhk.co/lexoxuxoluvi/9gg7GEy/norse_gods_book_amazon.pdf
    • https://fobaripiso.weebly.com/uploads/1/3/4/4/134443650/damifatone.pdf
    • https://cdn.sqhk.co/ruvonusebex/iPSeQZc/77698770680.pdf
    • https://xeninudi.weebly.com/uploads/1/3/3/9/133997188/6305146.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_47e81256ccbf4a17aad37b54bfb9d794.pdf?index=true
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_7926e946939e4ff1a809ca192ae62771.pdf?index=true
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_779712ff7d8e4811ab775bb0f5118c64.pdf?index=true
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_a6122096aa7f4328b3e6ae9f58810d05.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010043.bin
cf9fd7eb2125e34fc599a0c3a6b5048373f014cc1f082c8db30b0871d239e2f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 4688 bytes
font_01_sfnt_off00011045.bin
420b119a164c0430dc0a86649ff9840f819d05ad952555d8310ff0b1d842d8cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11045 12052 bytes
font_02_sfnt_off00013725.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13725 4324 bytes

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