Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa03c2935e40add…

MALICIOUS

PDF

79.9 KB Created: 2021-03-11 22:27:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 71d5c9fd555333746821f2acd284908f SHA-1: cb92205ee0b400a35c56f348c04ffc8b5925f2f1 SHA-256: faa03c2935e40adde34df9a817bbff0ffa9a076b633d0425af82f10e37739488
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the document's structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=adverbios+en+ingles+lista+pdf In PDF document text
    • https://fugomunufu.weebly.com/uploads/1/3/4/5/134586131/lejoxuso-fawibikevek-belosoloki-zapomi.pdfIn PDF document text
    • https://wivapitawipalex.weebly.com/uploads/1/3/2/6/132682528/02fd36e5421ff5.pdfIn PDF document text
    • http://xtreme-sport.ru/reading_comprehension_workbook_grade_5a2nkf.pdfIn PDF document text
    • http://levantemosaic.com/how_do_you_winterize_a_hayward_h_series_pool_heaterxf4nh.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/abecedario_en_ingles_pronunciacion.pdfIn PDF document text
    • http://vemasujananexu.22web.org/65465996363.pdfIn PDF document text
    • http://clebohets.xyz/44703334815jmpx6.pdfIn PDF document text
    • http://lifeshop.pro/sheriff_of_nottingham_disney_villains_wikivmxvp.pdfIn PDF document text
    • https://jumojebanofoz.weebly.com/uploads/1/3/5/3/135302369/nubatijagelulu-penalixob-ralop-vinatanata.pdfIn PDF document text
    • http://mivetys.xyz/72013774787ni3ad.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/belapawerezuju/ibn_al_arabi_books_in_urdu_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d178d4-2be2-4787-8457-dd5058489fd2/zomifabuziravimube.pdfIn PDF document text
    • http://sesumedafe.epizy.com/dayton_gas_heater_pilot_light.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/wuxakusenifosaladevuko.pdfIn PDF document text
    • http://dofomexikokubeb.epizy.com/28338896750.pdfIn PDF document text
    • http://fadudenomo.onlinewebshop.net/beanie_pattern.pdfIn PDF document text
    • http://muduwabu.rf.gd/criminology_a_sociological_approach_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/m16_eye_bolt_data_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc9a201-b839-479f-a571-a511c0637bc4/why_does_my_freezer_not_freeze_properly.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/wifi_deauth_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/batch_manufacturing_record_sample.pdfIn PDF document text
    • http://fumaresaxebikab.epizy.com/android_chronometer_countdown_timer_example.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_off0000efd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD2 5400 bytes
SHA-256: 1d4b5e145514bea0e7325273d56994d3ca837e924435ec53eec6c1d4efdc32f3
font_01_sfnt_off0001023b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023B 1596 bytes
SHA-256: dae830e9d9cfa4640a5d3283b86820f6f3dd5819bfff5998a177721114760411
font_02_sfnt_off00010a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A55 11512 bytes
SHA-256: 8bd65b58c6e31675af8905d27d1967c2dc712f5ddcc1e0f8f0c79d8f3070f251