Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed1d7e05088b7f7…

MALICIOUS

PDF

75.2 KB Created: 2021-03-08 23:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: bf8227227e852ca3500e67070c276bff SHA-1: 4a89c4888008106d36cae320398b70886c8a3127 SHA-256: 5ed1d7e05088b7f7735cb236425588e98c58e9860b0def8c5e14d8281f3ef3d3
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external URLs, with at least one, 'https://resalured.ru/award?keyword=ccna+200+125+official+study+guide+pdf', appearing to be part of a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a link farm designed to redirect users to malicious content.

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://resalured.ru/award?keyword=ccna+200+125+official+study+guide+pdf PDF link annotation
    • http://xepidenad.scienceontheweb.net/16554311175.pdfIn PDF document text
    • http://suwefazimim.medianewsonline.com/tubagatolefaxu.pdfIn PDF document text
    • http://ratedewu.scienceontheweb.net/a_histria_do_brasil_para_quem_tem_pressa_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/igBhak4/fazomojewow.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/tofewugajafuzajuzajutewi.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/iheijic/play_las_vegas_casino_slots.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/ijjjDhe/wobobukalag.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/HhihdEh/fuxifugotar.pdfIn PDF document text
    • http://rijebipimaba.getenjoyment.net/who_are_the_richest_billionaires_in_america.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/zudofumufosatenutil.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/meade_etx_60_manual.pdfIn PDF document text
    • https://jifofavara.weebly.com/uploads/1/3/4/6/134631997/9ffa69a475224d.pdfIn PDF document text
    • https://fadefewili.weebly.com/uploads/1/3/4/3/134316521/taratuvi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/chemistry_of_life_crossword_puzzle_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a3cb8c3-1ca3-42b4-870d-93a9a39719fa/will_there_be_another_artemis_fowl_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5a5fe4-f94a-490a-a807-40036785f5a6/stoeger_m3500_chokes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee52d627-0f44-482c-a363-f2b1ca7db4b8/30141560450.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/violin_bassoon_duet_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/804d16c9-c677-46ed-8b37-ae9b5ca52312/yamaha_rx-v363_specs.pdfIn PDF document text
    • http://lawewil.atwebpages.com/guwojalodexepidibuvasor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf87463b-f3d7-4b63-9d57-f0264abc66d5/esl_speaking_lessons_intermediate.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/wasonuzipad.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/is_dragon_dictation_worth_it.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_off0000e783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE783 5684 bytes
SHA-256: cada76549c3da4505736b25556e68e06a3c5393b9e5eb584199d529afcfcc42c
font_01_sfnt_off0000fb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0E 10660 bytes
SHA-256: 806b65b718a6960abe4e95ec221e868ece0bad84d74b2296548f0f045d719aff