Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ae3e49c728a161…

MALICIOUS

PDF

76.3 KB Created: 2021-03-18 00:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 345b822644d61df5d713369d26bb84f8 SHA-1: d70fe3a763deafec0097a85cc71e699f4d3f1d51 SHA-256: 99ae3e49c728a1615d60d6a3c132bc5fce6ab483c39c8bfb46bd1eb129445255
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing campaign by embedding numerous external links. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to drive traffic to various malicious sites, including one that hosts a PDF payload. The ML classifier and ClamAV detection further support its malicious nature, pointing towards a phishing or trojan distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=dometic+ac+circuit+board+troubleshooting
    • http://wowitaly.pro/magaxid29454.pdf
    • http://kulofokugizadeb.22web.org/dunopiwubanixedudomaxad.pdf
    • https://cdn.sqhk.co/muwazubivotu/gjbZhgF/is_the_real_ivan_the_gorilla_still_alive.pdf
    • https://wokogosomexar.weebly.com/uploads/1/3/5/3/135322546/jesigopezekib_zanufujan_lovogi.pdf
    • https://cdn.sqhk.co/kugefiruxat/cibifjb/arizona_shooting_restrictions.pdf
    • https://dowizipolejufu.weebly.com/uploads/1/3/0/7/130775784/c4d29f7e.pdf
    • https://zesajuletolif.weebly.com/uploads/1/3/0/9/130969916/buravinuzulig-mamojetet-kopirovopubur.pdf
    • https://bururinuriz.weebly.com/uploads/1/3/4/8/134882015/pamituweju.pdf
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/906373c9d44bbe.pdf
    • https://botiwugagow.weebly.com/uploads/1/3/1/8/131872238/857628ae1ba.pdf
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/3552614.pdf
    • https://kisewosa.weebly.com/uploads/1/3/1/0/131070890/6258733.pdf
    • https://cdn.sqhk.co/matajikiwov/eowigij/xazatonobenifiru.pdf
    • http://makeyourself.xyz/the_girl_with_the_dragon_tattoo_book_endingil22c.pdf
    • https://buzomuzugagi.weebly.com/uploads/1/3/4/3/134313884/3207110.pdf
    • https://vukexelisijaka.weebly.com/uploads/1/3/1/0/131070195/pipesolarizon-petanunufenoga.pdf
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/teboxazizoneme.pdf
    • http://govnososal.xyz/mudarapurowdel4o.pdf
    • http://sweetygirl.club/where_is_the_reset_button_on_a_badger_insinkerator1sk28.pdf
    • http://bexukitekivotap.22web.org/61708933955.pdf
    • https://kevonixoxudunu.weebly.com/uploads/1/3/0/7/130775897/9639865.pdf
    • http://axecheat6.xyz/226417353729wavc.pdf
    • https://cdn.sqhk.co/wajuletixex/ZgihjCT/36801374079.pdf
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/munoke-legotala-wetixow-kulurewe.pdf
    • https://xaleratugigajij.weebly.com/uploads/1/3/4/6/134631249/zolazidax-puzurefaji-xeronifipegareb.pdf
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/likikoba_zowexidosazese_sowuxoraka_jawile.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tonabezagarizom.epizy.com/zobepelubaxonag.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_off0000ed0a.bin
029317e209d91560261d534c203b8171149dd5e1ce8fe7920419fffceda94b1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 5492 bytes
font_01_sfnt_off0000ff88.bin
38f17ae7ded03d634553b2efdd9ced2c231fa1796718958059966cca6f78edb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF88 10604 bytes

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