Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3f032816c83b5e…

MALICIOUS

PDF

71.9 KB Created: 2021-03-19 21:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 698601f33e5a4874147324eb71f2fafc SHA-1: bb7fd66cf12af7f942be70fdd97037af23c2cccd SHA-256: ce3f032816c83b5e7a3983a725ab01bb6c1f0254d214b3bf93db6bd7b6ce0a7f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, designed to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's part of a campaign to drive traffic to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/wix?keyword=mad+max+up+to+the+task+trophy
    • https://wovegusokab.weebly.com/uploads/1/3/4/8/134850220/ee09e6361b1c63.pdf
    • https://bopuxokefira.weebly.com/uploads/1/3/5/3/135300507/d160efeed6e.pdf
    • http://wei-nmvc.com/download_walkthrough_final_fantasy_7_bahasa_indonesialz06h.pdf
    • https://wilulesutazi.weebly.com/uploads/1/3/3/9/133997377/15666.pdf
    • https://ranezilipevag.weebly.com/uploads/1/3/5/3/135392607/894510b39d0aa7.pdf
    • http://copyright-help-report.com/79359981200adijv.pdf
    • http://cadenalia.com/dexisuregagufi72hlp.pdf
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/ginoxutuduzotu-gemowonexawojar-kotixelotuxomok-midavibilevif.pdf
    • https://varozuwibudod.weebly.com/uploads/1/3/4/3/134327914/dokigusaf.pdf
    • http://idealica-it.website/201382243562wxk9.pdf
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/sozokipusuvokeloguga.pdf
    • http://beririka.scienceontheweb.net/a_level_economics_syllabus_zimsec.pdf
    • http://pinenud.mygamesonline.org/catholic_catechism_book.pdf
    • https://sarutofujatazix.weebly.com/uploads/1/3/4/5/134584212/530cfdf3.pdf
    • https://vidowenabep.weebly.com/uploads/1/3/5/3/135322196/1310583.pdf
    • http://zazorin.scienceontheweb.net/smart_goal_setting_worksheet_for_high_school_students.pdf
    • https://rosififobagas.weebly.com/uploads/1/3/1/1/131164218/pozojamibasafex_sotaweloxe_nemavim.pdf
    • http://steelsho1.club/amkoullel_amadou_hampat_badi289.pdf
    • http://b0xberry.online/jolt_credit_union_careersdes6v.pdf
    • http://clubstore.pro/391442036ov2wd.pdf
    • https://lotuwuwobegeze.weebly.com/uploads/1/3/4/4/134476082/1231033.pdf
    • https://xiligori.weebly.com/uploads/1/3/1/4/131411896/cb7ab.pdf
    • http://dostafood.xyz/24155303609tsili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zimopup.myartsonline.com/carnauba_wax_msds.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_off0000db7c.bin
86fb448e527c1fc264345a8155aca0c2f66acff05fe495cc46d421dd7e9c76ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 5408 bytes
font_01_sfnt_off0000edc7.bin
b817af7fe649bd1dbfeb013d3a25bbda7d6d4ba00868a861f9a9ddf497eac8a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 10872 bytes

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