Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cde362cef650498…

MALICIOUS

PDF

82.9 KB Created: 2021-04-08 00:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 46f8ed137e06f0ea97518cf4113c278e SHA-1: 70280313865090955e19cfb971cc02bce40457ad SHA-256: 2cde362cef650498b1538730b6f6422d0b934eacd8b6c59fa4ad6c66a2e4475c
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, https://jumiwimov.ru/strik?utm_term=the+crown+season+2+episode+6+fact+check, is presented as a search result, likely to trick users into clicking. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/strik?utm_term=the+crown+season+2+episode+6+fact+check PDF link annotation
    • https://cdn.sqhk.co/lumolixuwo/5eASF0g/7741533643.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/easywriter_7th_edition_barnes_and_noble.pdfIn PDF document text
    • http://rumukisizupew.iblogger.org/wixefakag.pdfIn PDF document text
    • https://dovasivenumi.weebly.com/uploads/1/3/5/9/135965427/3204782.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/xdjaLLi/jiffy_lube_oil_change_repair_tulsa.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/6iigdsl/lock_screen_wallpapers_of_ladybug_4k_hdr.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/nimodipine_subarachnoid_hemorrhage.pdfIn PDF document text
    • https://fijuzezakuxulow.weebly.com/uploads/1/3/5/3/135391315/3d7c0b.pdfIn PDF document text
    • https://cdn.sqhk.co/vozogekom/UxlVjhb/sizizelejorede.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/logitech_k800_wireless_illuminated_keyboard_instructions.pdfIn PDF document text
    • http://penodesige.iblogger.org/mitosis_and_meiosis_comparison_worksheet_answers.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/zuliladilakemelijibixut.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/ea31b8bd530a7.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/ifsUqZK/xcom_enemy_unknown_plus_vs_enemy_within.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/je1riiD/extreme_super_car_driving_1_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/H1ighfQ/5028810823.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f1e11ea9-a931-46ad-af30-391325c877dd.filesusr.com/ugd/423518_522f01aec9f64a5dad5ffd1ca8c5b50f.pdf?index=trueIn PDF document text
    • http://silapopo.epizy.com/diviwuzakivevoropazazika.pdfIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_b0210f84c90149e79785e99377a71754.pdf?index=trueIn PDF document text
    • http://lokunegop.epizy.com/what_does_voiced_and_unvoiced_mean.pdfIn PDF document text
    • http://lozopavo.rf.gd/anger_management_skills_worksheets.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/editorial_design.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FD 5604 bytes
SHA-256: 07d4918cb409cc005ba4e4bfdad69d6ae95efa0086c40d918baf54e39fdc2a5f
font_01_sfnt_off0001171b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171B 11304 bytes
SHA-256: 44c080194e48f1ce0eaabce69ff06fdc918bab77a291aacc2bd3119ad6c59862