Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2c2041392a1d92…

MALICIOUS

PDF

84.0 KB Created: 2021-03-26 06:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e376f699e267debf1f7986d79d31ef3b SHA-1: bf250495f2006e20962bd4a4c63cdda8f233b418 SHA-256: 4b2c2041392a1d92b5541b3f2d67e3ac52d71de711f7b78d2611e43916148f61
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains a large number of external links, suggesting a link farm or phishing attempt, with one prominent URL being https://lozipotod.ru/wix?keyword=boeing+737-900+united+first+class. The presence of embedded URLs and the overall structure strongly indicate a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/wix?keyword=boeing+737-900+united+first+class
    • http://xejepurefe.scienceontheweb.net/74862847101.pdf
    • http://nomolizuxabid.22web.org/ocean_city_nj_tv_channel_guide.pdf
    • http://tipijijajofupi.sportsontheweb.net/pefetupifaferetus.pdf
    • http://vijevejumozugim.sportsontheweb.net/dd_dungeon_tiles_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zatejufeg.rf.gd/old_bollywood_songs_whatsapp_status_video.pdf
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_6737f26b06224232aa5fda92c64b4f77.pdf?index=true
    • http://nukilaba.myartsonline.com/zajulebavisufimuranis.pdf
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_18feda7c0c3140e984b8aa1c1d175893.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9457fea5-acf9-4f33-99b0-b6751bac72e4/40_rules_of_love.pdf
    • https://uploads.strikinglycdn.com/files/c1eb7f7f-37dc-4258-b8e9-c103e733d864/sears_craftsman_garage_door_opener_remote_stopped_working.pdf
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_7d6c0e15997b4e28842523d7457987ae.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b2082fbb-5027-44cb-9498-d0165bfcc394/wunusixasofamekokojez.pdf
    • https://uploads.strikinglycdn.com/files/69fc88fa-ee09-41d4-8707-5704613d98f0/segusapok.pdf
    • https://uploads.strikinglycdn.com/files/945927b1-111a-463c-8335-b914530dbe4a/blackjack_chart_stand_17.pdf
    • https://uploads.strikinglycdn.com/files/33abbae3-d6ad-46f9-a707-a884bd431041/how_to_edit_grub.conf_in_centos.pdf
    • https://uploads.strikinglycdn.com/files/323c2d4c-a91b-4801-91a7-2bec9d42ee3e/vampire_dark_ages_v20_download.pdf
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_ea14a290c0554944a621099001226559.pdf?index=true
    • http://putojoner.rf.gd/valesukolegagufa.pdf
    • https://uploads.strikinglycdn.com/files/d3d8853d-64b7-42d9-bb8c-6383d8d4d4be/302237986.pdf
    • http://vipuzala.myartsonline.com/36661244707.pdf
    • https://uploads.strikinglycdn.com/files/e202018d-fcb6-4aa8-a3fa-7076df4f9a96/mimajakexitizilajejo.pdf
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_e73b49fe99b04c09add6e11329e58f6e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0423dfa3-1331-401f-944f-840fb26798b7/96453590195.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_off00010829.bin
82d1305fdea0b534e9f683c6a3c006a9a28760dbed559edd8a3dfacb60525d24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10829 5812 bytes
font_01_sfnt_off00011c16.bin
2b90612fd9e68375cd60ee51ea51c6d3533968d6a27175da49923a956e1f99ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C16 11224 bytes

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