Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b04e1170f476ee8…

MALICIOUS

PDF

89.4 KB Created: 2021-06-02 16:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 04d2a3ccb968e02b297b4cd68a996179 SHA-1: 73f65ed9d65e6ff1c5734619b59ef8cb77e3aec5 SHA-256: 5b04e1170f476ee8164c0417da8634dc8db4a20582543bfd94e07f6a510e5425
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be a lure related to vehicle repair, likely intended to direct users to malicious websites.

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://pixomot.ru/pbw?utm_term=how+to+fix+a+mercedes+sprinter PDF link annotation
    • https://tobapedez.weebly.com/uploads/1/3/5/3/135344168/sogogaluka_lajuvuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403428/normal_6011fdeac0255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_605c9510a343e.pdfIn PDF document text
    • https://wijugiretatito.weebly.com/uploads/1/3/2/8/132814958/nozelo_tuzulofaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485699/normal_60264ea09ee83.pdfIn PDF document text
    • https://mefopati.weebly.com/uploads/1/3/4/8/134866381/todajetipe_pupufizevekavo_netegopitot_wowiri.pdfIn PDF document text
    • https://kakizizutubune.weebly.com/uploads/1/3/4/3/134351089/sakozi-tonoxu-giwepewez-fipazuliropesej.pdfIn PDF document text
    • https://siropenisawad.weebly.com/uploads/1/3/4/3/134353493/sibibigusagobakugas.pdfIn PDF document text
    • https://zukedobawalot.weebly.com/uploads/1/3/4/5/134526307/webalenesi_weser_nupomebaxife_rikeselewon.pdfIn PDF document text
    • https://zaduguwage.weebly.com/uploads/1/3/0/8/130874015/roverivunixek-wosurut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijakezepo.pbworks.com/f/full_namaz_in_english_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197ec2b1-0357-46f4-ab2c-4fb93ba7ab5e/where_to_buy_go_board.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/w/file/fetch/144457983/95792481985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d088489e-59f1-48c8-8994-e14b3f243754/resumen_la_leccion_de_august_por_partes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/088c6fa1-f26e-4052-bc08-5e92b3a86758/6067893429.pdfIn PDF document text
    • http://rijunepupuja.pbworks.com/f/how_to_solve_word_problems_on_photomath.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84a5828-7eac-4f4f-8744-239e9742bd54/moragilaxolutekazepivo.pdfIn PDF document text
    • http://nefusim.pbworks.com/w/file/fetch/144465189/simplifying_polynomial_expressions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c88c83-3365-44fd-8961-fd336f047076/beautiful_creatures_2_movie_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaca5988-d597-4566-a23e-a16f328f31f2/harriet_tubman_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2632d5eb-2c0f-4f24-ab18-6a5a7ce429dd/teorema_de_moivre_laplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baea1226-c786-431f-a619-257635dca74c/what_is_self_efficacy_theory_in_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54510fbf-7898-4110-a770-c666483d522f/cant_delete_netflix_app_from_samsung_smart_tv.pdfIn PDF document text
    • http://pezaloribed.pbworks.com/f/vortex_cloud_gaming_apk_hack_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5790c216-9946-488d-bcbe-99495031c932/75242459199.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_off00011cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD4 5392 bytes
SHA-256: b6abec45580aff769e5c660dab3c24fdd196659adee1d43464d867d11af75358
font_01_sfnt_off00012f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F28 12116 bytes
SHA-256: 5a229192935405e125b58d3050d6c727bcb1acba045bfcc6d2b288aa76b91820