Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b920158c588681a…

MALICIOUS

PDF

81.5 KB Created: 2021-04-08 06:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1e2e00f0d46532f2c543322929c8f858 SHA-1: a23092dfb95c61951c48128bf586014ee72f92b3 SHA-256: 7b920158c588681ae42db11f738bac53d3d3c34b488513782c4932c4c1f90d03
126 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 a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The presence of a link with a 'utm_term' parameter further supports the idea of a targeted lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=matlab+simulink+tutorial+for+beginners+full PDF link annotation
    • http://evatopshop.xyz/radha_krishna_full_hd_wallpaper_1080p5bkh2.pdfIn PDF document text
    • http://thepropheticapp.com/google_hangout_for_macsx2yj.pdfIn PDF document text
    • http://doporujela.iblogger.org/balika_vadhu_ki_ringtone.pdfIn PDF document text
    • http://opensol.xyz/31227723559w1sek.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/giiTgjF/operate_now_animal_hospital_download.pdfIn PDF document text
    • https://xowarumi.weebly.com/uploads/1/3/4/5/134519529/xuzaxesubefebud_janaxifuvu.pdfIn PDF document text
    • http://selectgetc.top/vs_E5B590_E58B95E794BBnm0ty.pdfIn PDF document text
    • http://cookwellbakewell.com/the_circulatory_system_worksheet_answers_bogglesworldeslth8pn.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/zhbieDn/zitokivin.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/evEORXc/satojijunikej.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/iI41ldb/pitesigi.pdfIn PDF document text
    • https://depagolal.weebly.com/uploads/1/3/0/8/130813973/dea2068c2c2b39.pdfIn PDF document text
    • http://abwaab.su/jobokufodulibizejivust782f.pdfIn PDF document text
    • http://twitter-center.com/icd_9_code_for_fatigue_pain_scapular6n3bj.pdfIn PDF document text
    • http://world-wild-shop.com/mijaru6f14g.pdfIn PDF document text
    • https://gazezujebek.weebly.com/uploads/1/3/4/8/134881616/7640186.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/cjevjEZ/flat_pack_homes_for_sale_from_germany.pdfIn PDF document text
    • http://pe50off.info/walmart_pharmacy_phone_number_and_address96enm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokokimalofov.rf.gd/wokokupokalubi.pdfIn PDF document text
    • http://sugunava.epizy.com/blundstone_fitting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af8f193-4699-4315-90d7-1e00784efd5e/how_to_change_manual_transmission_fluid_2006_honda_civic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1725cc60-d06d-4651-86e6-a256653013ff/senior_operations_manager_salary_philippines_per_month.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407a491f-fed2-4998-b4a9-cd2b6e54b0b4/under_the_dome_full_movie_watch_online_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c8960e3-3bdb-4d3b-bb41-928639d1ce36/bafang_bbs02_external_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abe5aec-c416-4f87-891e-07eff16fb49a/how_to_reference_accurately.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_off0001008e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008E 5296 bytes
SHA-256: d6c4b371d55b9ff469ae44150f15b85d21f0af0d42e5232327175cee56ef7a31
font_01_sfnt_off0001128c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128C 11056 bytes
SHA-256: 70d355a2f5b041f2c1d8c15b9a28fa90d831dae85f9ef52c7df99be22b550bc2