Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc23fa3a1fdbfee…

MALICIOUS

PDF

88.2 KB Created: 2021-03-17 19:02:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be7e91bcdb920f4fdba470528535aa74 SHA-1: b6cd28142a580c0433c7bd0ba7bde34aa1ccb897 SHA-256: 2cc23fa3a1fdbfee9068346c63b01a43c407c41e5af4ffb3b487f3921c3f4838
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary URL, 'https://jacksth.ru/wix?keyword=tv+scripts+pdf', suggests a lure related to 'tv scripts pdf'. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', indicating a phishing or trojanized document.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=tv+scripts+pdf
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/bejipa.pdf
    • https://ditoxinenibon.weebly.com/uploads/1/3/4/3/134324582/nofefukujep_fanora_wapixato.pdf
    • https://zibakuponitek.weebly.com/uploads/1/3/5/3/135303957/zulazazidolu.pdf
    • https://goluluvofa.weebly.com/uploads/1/3/2/7/132712214/19aa40f4615fcc5.pdf
    • https://jodaxirijiv.weebly.com/uploads/1/3/0/7/130776114/5051942.pdf
    • https://wozagasogudizi.weebly.com/uploads/1/3/2/6/132682295/ca21f.pdf
    • https://viwoxinuzozaxa.weebly.com/uploads/1/3/1/6/131636825/7461018.pdf
    • https://fosovumukudire.weebly.com/uploads/1/3/4/2/134235423/fidazi_nufape_viboduvoje.pdf
    • https://totakolexab.weebly.com/uploads/1/3/5/3/135391630/fitesozewixu.pdf
    • https://wezawemexa.weebly.com/uploads/1/3/1/4/131410399/mepuseg_xagowa_toraxamo.pdf
    • https://xoxumowuna.weebly.com/uploads/1/3/5/9/135964844/5e9276b2c6b867.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jevelel/energia_eolica_definicion.pdf
    • https://uploads.strikinglycdn.com/files/b4e65d4d-4912-47fd-b10f-224f6d77b57c/the_amazing_spider-man_the_ultimate_newspaper_comics_collection_volume_1.pdf
    • https://s3.amazonaws.com/dibedamoka/xbox_one_wireless_controller_audio_jack.pdf
    • https://uploads.strikinglycdn.com/files/e4be30a3-f378-439c-a793-5cdd804ebf79/2793635677.pdf
    • https://uploads.strikinglycdn.com/files/fa445199-c8bc-4f87-acd4-df1727046c9e/calories_in_el_pollo_loco_flour_tortilla.pdf
    • https://s3.amazonaws.com/mexesazaxasa/89521538269.pdf
    • https://s3.amazonaws.com/pogolo/9358131749.pdf
    • https://s3.amazonaws.com/voropa/how_much_does_a_family_photoshoot_cost.pdf
    • https://s3.amazonaws.com/xufaxoferugod/xupitikosodelamupetuk.pdf
    • https://uploads.strikinglycdn.com/files/ce0b99a5-56f7-4ed9-a678-ca7fc98401a7/why_is_my_washing_machine_leaking_during_the_spin_cycle.pdf
    • https://s3.amazonaws.com/kigavanus/55260468184.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_off00011b36.bin
a91389a23d0ca578bbac8d9c1049d67769657ac1d3a84deb820e869987aa56ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B36 4916 bytes
font_01_sfnt_off00012c0d.bin
04df22d1129104471cba020050c3df29c83b73f0d049636e2bee8c2d7eaeeb63
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0D 11348 bytes