Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbe9a742aad292e…

MALICIOUS

PDF

86.2 KB Created: 2021-05-03 21:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5cf6917f8060c2704bb2039a001bb53c SHA-1: 841dd933e4a73fb3e589cd9822eec1301d13d8e6 SHA-256: 7bbe9a742aad292e8981f85dd70c770501c4c049fa33ee60035d2e348bc68aff
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=vsp+small+group+enrollment+form PDF link annotation
    • https://cdn.sqhk.co/mevazasid/aificjg/alien_zone_plus_mod_apk_happymod.pdfIn PDF document text
    • http://cosmeteca.com/odia_video_song_pagalworldmcxdu.pdfIn PDF document text
    • https://cdn.sqhk.co/tugitajusow/igiOvje/82410949628.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/iAYOnjJ/13656848446.pdfIn PDF document text
    • http://zdorovienashevse.xyz/vanity_fair_womens_beauty_back_full_figure_underwire_bra_76380aty15.pdfIn PDF document text
    • https://cdn.sqhk.co/gidagolusi/gjjajfu/33217200780.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/fiieNQe/airlift_performance_3p_air_ride_system.pdfIn PDF document text
    • https://cdn.sqhk.co/wenoxavawo/cjbKiek/76676763135.pdfIn PDF document text
    • http://triple-doska6.club/aprendizagem_organizacional_e_educao31ym6.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/hn23oez/free_mp3_music_downloads_for_iphone_6_plus.pdfIn PDF document text
    • http://big-ita.space/the_white_tiger_film_plot_summary6sz0v.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/xegJ7jd/kivejodi.pdfIn PDF document text
    • http://rent-nout.site/josikovagisefavexn60dm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_810836ec7f53458ca4f478e10f78380e.pdf?index=trueIn PDF document text
    • http://votasaze.rf.gd/62390159797.pdfIn PDF document text
    • https://8c0e102b-efba-4641-b7fc-347c26357927.filesusr.com/ugd/d420ee_c1c6c16faab24f3fadcac23850e8796a.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_edf2432ecd9345738eaa18791d9dbf65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/72278723765.pdfIn PDF document text
    • http://gujuwaxewogo.epizy.com/jibijitojupasesuwon.pdfIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_244c5834d33949069383bce5cab876ec.pdf?index=trueIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_bb28763e9b314b55ac737ed658ef9443.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rerinago/bavinck_reformed_dogmatics_volume_1.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/32860968784.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CF 5020 bytes
SHA-256: 6dd67e7aae48b7f35d7c0ff127f5f2838f4d7aa72acf3ac5032f6135b6e230cc
font_01_sfnt_off000115ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CE 11396 bytes
SHA-256: 160284a2f670fa95b814710ab3affee467d088fbd0d60cdd516589e2573373ca
font_02_sfnt_off00013ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f