Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf715dac2db0e60…

MALICIOUS

PDF

38.6 KB Created: 2020-05-16 01:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb32857ec27cc2188085c78cc6b9db78 SHA-1: 821709f8035a9f80120f575da0e8431fb7a5f727 SHA-256: 2cf715dac2db0e608cd2e64725113c41c08c71cce3200bc788da0e45242deaa3
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the sheer volume of outbound links suggests a delivery mechanism for further malicious activity, potentially leading to credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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 http://yyanamode.com/uploads/1/3/0/6/130620510/130620510.html#mastering+chemistry+answers+chapter+1
    • http://showthemhowllc.com/uploads/1/3/1/1/131164007/1089151.pdf
    • http://1minpromos.com/uploads/1/3/1/6/131606073/mevenep_mibiwezoj_rakat_goxivuvabagem.pdf
    • http://groundedkohtao.com/uploads/1/3/0/7/130738593/92878c03107.pdf
    • http://bkdirrectconnect.com/uploads/1/3/0/5/130539702/goruka-disurel.pdf
    • http://lorajanerose.com/uploads/1/3/0/3/130313115/7091934.pdf
    • http://modisteandoentreculturas.com/uploads/1/3/0/8/130814718/81905bed06cdb.pdf
    • http://hotwifequeenofspades.com/uploads/1/3/0/2/130288580/11de1d5bfbcb5cd.pdf
    • http://maaedesigns.com/uploads/1/3/0/3/130323622/rifim_vikoxa_tipev_wuvin.pdf
    • http://abovetheclouds.guru/uploads/1/3/0/2/130272283/gubogojav.pdf
    • http://brunswickjunctionflowerboutique.com/uploads/1/3/1/4/131483307/wexesujukavexid-zufatu-dijusorezis.pdf
    • http://brownidemediaworx.in/uploads/1/3/1/4/131406356/wuwodi-bepagi.pdf
    • http://riveredgeconsulting.com/uploads/1/3/0/5/130542902/nusegonixuwi.pdf
    • http://chrisal.biz/uploads/1/3/0/3/130312920/buluvamu_xupemidones.pdf
    • http://youniversepublishing.com/uploads/1/3/0/6/130640021/e8e55422223b8d2.pdf
    • http://vote4jack.com/uploads/1/3/0/6/130604105/3241755.pdf
    • http://unicornsontheloose.com/uploads/1/3/0/8/130813696/9014527.pdf
    • http://eridanus-hb.com/uploads/1/3/0/3/130313194/zivomajuzatux.pdf
    • http://myprivatewebcams.com/uploads/1/3/1/3/131398515/7afb06c4ae4f095.pdf
    • http://corvedo.com/uploads/1/3/1/4/131453253/5925160e9d64b3e.pdf
    • http://reapersleeper.com/uploads/1/3/0/6/130620945/4246967.pdf
    • http://charlotteraby.com/uploads/1/3/1/4/131483361/lobezaru.pdf
    • http://mountainreveriemassage.com/uploads/1/3/0/6/130639105/5416206.pdf
    • http://nordicmarine.online/uploads/1/3/0/5/130551668/joxewulijokoni_puwamilos_witilesel.pdf
    • http://ooluk.com/uploads/1/3/0/7/130776254/sutilak-lulativoluded-vovus.pdf
    • http://wisdomconsolidated.com/uploads/1/3/1/4/131437261/norijitip_renokuzozudin_pepixalolo.pdf
    • http://wisdomconsolidated.com/upl
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006997.bin
e3954674663fd6d10d1d1c34ac318f3a210866c09406af20041c71cd5268325f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6997 10592 bytes

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