Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ce79d4950435ed…

MALICIOUS

PDF

88.5 KB Created: 2021-03-30 06:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 46d496da62295604946b0470bfe50c13 SHA-1: 8b8e3e8e321b77b727c9d2bc3c411c70486af7fa SHA-256: 36ce79d4950435ed653e10e2b92c0b15f14724cfd194f7745b4e35cc79df8c73
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://leonvi.ru/strik?utm_term=rosemary%2527s+baby+movie+synopsis PDF link annotation
    • https://kazobutuzag.weebly.com/uploads/1/3/1/1/131164075/b2bdd7a304.pdfIn PDF document text
    • http://malipawiw.22web.org/ketepetazalegefox.pdfIn PDF document text
    • http://robertferrell.net/norma_iso_14000-1jw8ja.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/gagoKWN/4228282303.pdfIn PDF document text
    • https://jaxifojuw.weebly.com/uploads/1/3/5/3/135351184/5734534.pdfIn PDF document text
    • http://golegujunag.iblogger.org/98340307327.pdfIn PDF document text
    • https://legukofa.weebly.com/uploads/1/3/5/3/135318177/wapevixinikav_razodiz_diterani.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/iiW2MyT/class_10_maths_solutions_chapter_8._2.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/CjiTHjd/marxist_criticism.pdfIn PDF document text
    • http://relodifalixogo.scienceontheweb.net/ncert_class_12_accountancy_part_2.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/mozipux7oly6.pdfIn PDF document text
    • http://vodekageka.22web.org/civil_engineering_internship_report_ppt.pdfIn PDF document text
    • https://cdn.sqhk.co/bezofusipow/Wxgezif/musically_app_logo.pdfIn PDF document text
    • https://tovexalo.weebly.com/uploads/1/3/5/3/135348509/suwanunun-tojasapumora-woniwedupu-vogobemifixagi.pdfIn PDF document text
    • http://zajilakofudo.scienceontheweb.net/wosijupepakiketatudo.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/nidikegibobufenoka.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/pakopew-nepolexorotowim-vivegigawa-jedubiwemusevul.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/chemical_effects_of_electric_current_class_8_notes.pdfIn PDF document text
    • http://islemleriniz.org/kindle_paperwhite_3_wont_turn_onvkbjl.pdfIn PDF document text
    • https://nijumaweka.weebly.com/uploads/1/3/1/3/131379182/gijumolomefo.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/QZiciad/3426410302.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/1134d6dcb94ee3.pdfIn PDF document text
    • https://kofagegupuk.weebly.com/uploads/1/3/2/3/132302723/zanuxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tenorokorav.epizy.com/what_is_your_leadership_style_assessment.pdfIn PDF document text
    • http://xuvunemomot.epizy.com/fundamento_de_la_destilacion_por_arrastre_de_vapor.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_off00011b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B86 5276 bytes
SHA-256: 8893502dcc7d103f76117016b114dbd24c2e7136077f8ea3315bc56fbec287c6
font_01_sfnt_off00012d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6F 11496 bytes
SHA-256: 483ef9586001466ff68d996672c668d19c2a58877841ae80982298d47303808b