Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40bee1cbd408202…

MALICIOUS

PDF

77.4 KB Created: 2021-06-14 05:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fbe59bce18e2c5ae3016b8f2256c21ca SHA-1: 30e95e0054c00168ab0bb81ccf0df8dbcb453558 SHA-256: b40bee1cbd4082022eddddb3d6887c12d87a0f23176b554153e4bf8499cce523
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The embedded URL 'https://irlanc.ru/pbw?utm_term=the+crew+2+cheats+ps4+2020' is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/pbw?utm_term=the+crew+2+cheats+ps4+2020 PDF link annotation
    • https://zuxidonav.weebly.com/uploads/1/3/4/8/134867872/sanuw-wunowewezegi.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/95a486f625cf46.pdfIn PDF document text
    • https://fovofenat.weebly.com/uploads/1/3/4/4/134489119/xobogale-raposejajo-gazew.pdfIn PDF document text
    • https://kuvuwivozud.weebly.com/uploads/1/3/6/0/136091804/zawiwibolis_xiwuxotubegepem.pdfIn PDF document text
    • https://pavaliwakugaban.weebly.com/uploads/1/3/4/3/134373235/gumazokenowoja_rogep_fapajaj_lizavelebo.pdfIn PDF document text
    • https://xedusajid.weebly.com/uploads/1/3/4/4/134444225/varatajebewived.pdfIn PDF document text
    • https://kavawemufelatat.weebly.com/uploads/1/3/5/3/135394651/8313355.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/7998085.pdfIn PDF document text
    • https://lusugola.weebly.com/uploads/1/3/4/5/134599647/c8b243846aab86.pdfIn PDF document text
    • https://nifabixiguwo.weebly.com/uploads/1/3/5/2/135295020/a2eb700e45.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/8850768.pdfIn PDF document text
    • https://nipodixosun.weebly.com/uploads/1/3/4/4/134494364/zujiwisujeg.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://xifilipisi.pbworks.com/w/file/fetch/144413715/66302139558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722ee3bd-6cdd-4c4e-bddf-ef58bb686b30/head_of_roman_patrician_context.pdfIn PDF document text
    • http://ralogotuxa.pbworks.com/w/file/fetch/144816231/49731733152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e432b85-7f41-4e87-8643-0a4f5b615274/motorola_cp200_earpiece_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32e11c6-167d-43ee-bfca-21243bcd1cb8/how_to_start_a_romance_fictional_narrative_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cdedc38-6d50-4f28-adb0-573d4183de54/perspectiva_caballera_ejercicios_resueltos_3_eso.pdfIn PDF document text
    • http://filijego.pbworks.com/w/file/fetch/145052889/bakery_business_plan_kenya.pdfIn PDF document text
    • http://febevolojezu.pbworks.com/w/file/fetch/144720669/albfilm_filma_me_titra_shqip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f2bb94-3732-42b9-a074-e472b25dbe11/que_hay_que_hacer_si_un_familiar_tiene_covid_19.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_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 4916 bytes
SHA-256: bfca25ffd5b809bea7d30e81acb2e71195e3bf5e6286f62ea5b6800c274d3824
font_01_sfnt_off0000f29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29F 11136 bytes
SHA-256: 43b0ef5efb0db0f5c17c9f68c5b429f2bfe82c9de4b4a34af02b244ac290d34b
font_02_sfnt_off00011874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11874 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378