Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5481bdbbffeb9c…

MALICIOUS

PDF

79.9 KB Created: 2021-03-02 05:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5363ab8e79d23537d94c9d411d952dfa SHA-1: 75df9e055948637a127a0c08e281c7de67cbf2bd SHA-256: ac5481bdbbffeb9c17e89ed5850896dcd980c817dfa794a2def7b7a92538861d
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, disguised with a keyword related to game mods, likely serves as a lure to direct users to a malicious download site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through social engineering, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://vilenefex.ru/wix?keyword=the+sims+mobile+apk+mod+unlimited+simcash
    • http://sosutisokalelul.iblogger.org/bloodshed_dev_c_5._9._2_free.pdf
    • http://palikexifumalam.mywebcommunity.org/ada_berapa_surah_di_dalam_juz_ke_30.pdf
    • http://cz-nitrof.website/marksheet_format_in_ms_word4v2j5.pdf
    • https://cdn-cms.f-static.net/uploads/4493553/normal_600fe1abf1881.pdf
    • http://nepatokada.mypressonline.com/87015327272.pdf
    • https://static.s123-cdn-static.com/uploads/4479674/normal_5ffcf0d42f4f1.pdf
    • http://vipimuxatomefi.medianewsonline.com/how_to_unlock_ge_top_load_washer.pdf
    • http://tugrull.com/mechanical_engineering_drawing_examples0u33u.pdf
    • https://cdn.sqhk.co/zapoboveje/cesGoQd/polan.pdf
    • http://dawexefif.getenjoyment.net/nada_carmen_laforet_genero_literario.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tujeviwakirawu/dupelijexopaxidizes.pdf
    • https://s3.amazonaws.com/buganabowumujef/bupadukimofati.pdf
    • http://gurabagoderes.atwebpages.com/dewalt_3000_psi_pressure_washer_for_sale.pdf
    • https://s3.amazonaws.com/rekawexuretowo/traffic_reports_near_me_now.pdf
    • https://s3.amazonaws.com/lepefi/wesaximila.pdf
    • http://nimunofat.epizy.com/el_agua_forma_enlaces_de_hidrgeno.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e0.bin
0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 6744 bytes
font_01_sfnt_off0000fac7.bin
5ed0bd3d16e9f68402bad001ec3429c5fa8f693fffc9e4b3f198220ded2b18b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC7 5372 bytes
font_02_sfnt_off00010cda.bin
a4411eb88bc219868dbdd5fa41c57ac8d06b5dfd22a5d44dfdf809af3e346193
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDA 10840 bytes