Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0ad08397648477…

MALICIOUS

PDF

77.9 KB Created: 2021-04-01 12:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 624bd996fc8a927e92f1cd244864ce24 SHA-1: d19762fb7f9a692966bfe5193c6657b6acd7c99c SHA-256: ec0ad08397648477b090478c480aeb914ab97747457429e392ebeffeae1599a2
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one prominent URL suggesting a lure for 'terraria apk full 2020'. Heuristics indicate a link farm and ClamAV detection confirms it as a phishing trojan. The embedded content, though obfuscated, likely serves to redirect users to malicious sites for payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/wix?keyword=terraria+apk+full+2020
    • https://cdn.sqhk.co/bexamajuw/6RqYP5O/89551381297.pdf
    • https://cdn.sqhk.co/lekifuwixal/bmQkBuJ/38165003099.pdf
    • https://cdn.sqhk.co/bisidilit/heHgiVS/72748055390.pdf
    • http://tobufupevujuma.mygamesonline.org/treatment_of_amoebiasis.pdf
    • https://cdn.sqhk.co/gazegarov/gcCnjjG/kasedogapifateda.pdf
    • http://padapup.iblogger.org/allen_test_papers_2020_jee.pdf
    • http://vinuporabomod.iblogger.org/42345094504.pdf
    • http://dalifajebuxog.scienceontheweb.net/primary_mathematics_2b_workbook.pdf
    • https://cdn.sqhk.co/filodomazora/jgiWdRE/88221582166.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jibimom.myartsonline.com/59159449689.pdf
    • http://pizidera.rf.gd/wijos.pdf
    • http://wodedane.rf.gd/82449884735.pdf
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_bdc1e37ed0bf44439b13079b39bd4f1d.pdf?index=true
    • http://gisoroxirofusup.epizy.com/algebra_lineal_grossman_7_edicion.pdf
    • http://dobusimosekaba.epizy.com/24984471437.pdf
    • http://welokaj.rf.gd/fonusibivoravugijurorime.pdf
    • http://gasanilu.epizy.com/balance_sheet_vs_income_statement_snapshot.pdf
    • http://vilatelisoto.onlinewebshop.net/mipufaribopapikerilaxixe.pdf
    • http://wepogevadapafa.atwebpages.com/edipo_rey_personajes_principales_caracteristicas.pdf
    • http://tagugatukosag.epizy.com/mcgraw_hill_textbook_answer_key.pdf
    • http://kubuleg.rf.gd/51971876967.pdf
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_1415d85b53d44ed9adbb4ea3c7b76081.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4be.bin
ea1abfb930780f4e0e3e2e755d8214a86c144df5ba52dfaca16d1636fe4541dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 5004 bytes
font_01_sfnt_off000105d5.bin
1d0436e235e0601f3ea8e48272015380ddf74735ebb8374801ce9a74d6997150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105D5 10944 bytes

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