Malicious PDF — malware analysis report

Static analysis result for SHA-256 3effe2ccfdea9cd2…

MALICIOUS

PDF

127.0 KB Created: 2021-03-14 12:10:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3d94e6bafa6257839b916ec1aebd33e SHA-1: 7d6912d34c72d4fd315f3542b4c5450712ead0c8 SHA-256: 3effe2ccfdea9cd2d88451428a5d70b7bf342d727bfc75b1e113ddaa3fe25456
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains numerous external links, with one identified as 'https://botokaw.ru/wix?keyword=gory+guerrero+age'. This indicates the document's primary purpose is to redirect users to potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=gory+guerrero+age
    • https://cdn.sqhk.co/nogorodizet/ihaflUk/ripakivagukinulaxirep.pdf
    • https://cdn.sqhk.co/jigitovewuk/hdiajfo/adt_pulse_login.pdf
    • https://cdn.sqhk.co/jibezilesu/gjhegjc/bmobile_top_up_code.pdf
    • https://cdn.sqhk.co/pananumujo/cgd9kgj/vemibojofabepebojuxiguwun.pdf
    • https://cdn.sqhk.co/dusujukakal/jiGgiku/47867821554.pdf
    • http://leoidet.xyz/rupawiremimun8byjn.pdf
    • http://axecheat5.xyz/siwufewitalasozalifuji3uugb.pdf
    • https://cdn.sqhk.co/pasezateda/iibxTvO/dojitu.pdf
    • https://cdn.sqhk.co/zikegasenar/kMhaiht/free_mp3_voice_recorder_windows_10.pdf
    • http://aycotoro0.xyz/ejercicios_comparativos_y_superlativ62u0p.pdf
    • https://cdn.sqhk.co/ninuxoti/Xyjh5uP/nexapuxitowip.pdf
    • https://cdn.sqhk.co/xaxovowupofa/TT4ibhc/easy_chocolate_icing_without_butter.pdf
    • https://cdn.sqhk.co/posojuvapono/igeidgj/xatufoselotixijidafuxix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_12f02506b77e4a778ba6860c670c0daa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ea198f03-3ac6-4bd9-979f-a9167d0ece8f/1349480832.pdf
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_694e7be52c5345a4ae27d7d67d53a259.pdf?index=true
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_e3f1d675f2954ed8bac15c5284c578a0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/192f5539-285e-41cf-b742-1831328dfbe1/9432092916.pdf
    • https://uploads.strikinglycdn.com/files/ced1963e-3e45-4659-883e-e751c9d039f4/mini_gs_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/e9b0bd2f-a255-4c2c-9fe3-8eadffda4a23/john_grisham_books_paperback.pdf
    • https://c750c8cf-f189-4014-a78e-197d4cb0f9f2.filesusr.com/ugd/e5a943_e17b35f1114846a785316d9c698f2117.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f838649b-20fd-420c-8f93-5d612b6a4a8c/the_trials_of_apollo_the_tower_of_nero_characters.pdf
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_7500dcfea2e84347bb1c333dadc1162a.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_off0001b617.bin
6decffdf17511fa1867978f5b937af848fdd06af7ec7320b75a232a24397b55d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B617 4776 bytes
font_01_sfnt_off0001c676.bin
77a5911f19fb7b9de4a62ab327667debb10c55a2d804afe12affd13237ae8c20
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C676 12116 bytes