Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2de8b5b758c8ec2…

MALICIOUS

PDF

79.0 KB Created: 2021-05-14 07:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f2c084e421887401d65b6c19457b3a34 SHA-1: 23c36d5878c53ef93ce53bf57d48ff9b5ea69c87 SHA-256: b2de8b5b758c8ec24f72e6a7cdb9b56b560b4a9bb682db35aead734eac7e21ac
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to a common search query, suggesting a phishing or malware distribution attempt. The presence of external URIs and link farm characteristics indicates an effort to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://botokaw.ru/strik?utm_term=water+heater+pilot+won%2527t+light+honeywell PDF link annotation
    • https://xijofufakeziti.weebly.com/uploads/1/3/1/3/131380729/2157648.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/descargar_el_civilcad_gratiswjohv.pdfIn PDF document text
    • http://gidpopiteru.com/ar_15s_for_dummiesiogfv.pdfIn PDF document text
    • http://tumbochka.space/drum_pattern_generator_abletondguq2.pdfIn PDF document text
    • http://ukrdomonis.xyz/whirlpool_cabrio_platinum_washer_not_turning_ond26ak.pdfIn PDF document text
    • http://istlan.fun/distributed_algorithms_nancy_lynch_free_downloadnylby.pdfIn PDF document text
    • http://tryraisins.pro/three_days_potty_trainingjiejc.pdfIn PDF document text
    • https://luvikexixof.weebly.com/uploads/1/3/4/4/134481561/4961847.pdfIn PDF document text
    • http://ooovseanalizi.ru/free_monthly_expense_sheet_excel_templaten0cuu.pdfIn PDF document text
    • http://carbags.site/kenmore_elite_oasis_king_size_capacity_plus_washerjynww.pdfIn PDF document text
    • http://gonalotuturopil.mywebcommunity.org/aisi_4140_standard.pdfIn PDF document text
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/bamarobewus.pdfIn PDF document text
    • http://mkr-olimp.info/xesamasudobapuvonhbzl.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://gouliwer.online/how_much_do_planet_fitness_makevij2l.pdfIn PDF document text
    • http://tikovg.xyz/kenmore_front_load_washer_error_code_f-21gbkw0.pdfIn PDF document text
    • http://natfreshik.fun/how_to_write_a_simple_song_lyricsv64wb.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
    • http://kofepiropi.onlinewebshop.net/puxexuvokutuvin.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/27636045130.pdfIn PDF document text
    • http://senesijosezetu.myartsonline.com/giwusonizenevilusum.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_724e4dcc5b0648448df5f2261b42fc9d.pdf?index=trueIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_0811b94db1fe4fae9269cc61381462c4.pdf?index=trueIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_f84adfa0dc7b454bb829e2619168061c.pdf?index=trueIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/71086858245.pdfIn PDF document text
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_95732b0c1fcb4d5db154e870c77d013f.pdf?index=trueIn PDF document text
    • https://49f3a523-2ddb-4f17-a073-729d67a362fa.filesusr.com/ugd/18c683_4b3ff4706e2140109a47f2e4434e039d.pdf?index=trueIn 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_off0000e8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D2 4932 bytes
SHA-256: c240f61d61d20223f38df67f477c61bda948f82d356de7929961692ffd4b123a
font_01_sfnt_off0000f9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AE 10716 bytes
SHA-256: 5c84f9c3817fb3558a8930757c1e708728885445188f8ab0b5bdd35b7044c47e
font_02_sfnt_off00011e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E24 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3