Malicious PDF — malware analysis report

Static analysis result for SHA-256 d057e5830c1a7728…

MALICIOUS

PDF

73.6 KB Created: 2021-06-13 02:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6e12c39fd0745303f3f6adeeae481ec4 SHA-1: b60f0cb1ea136651e10a837030174da95afb48a1 SHA-256: d057e5830c1a7728f14ccb931dc1938833fd82a354fb3ee2ea5286bc294b88b8
186 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The primary URL, 'https://nomylo.ru/pbw?utm_term=transfer+apps+between+phones', suggests a lure related to phone app transfers. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nomylo.ru/pbw?utm_term=transfer+apps+between+phones PDF link annotation
    • https://kunepupavebi.weebly.com/uploads/1/3/4/0/134095879/84ea0751e7.pdfIn PDF document text
    • https://jaginozowelizuf.weebly.com/uploads/1/3/4/7/134729204/4041119.pdfIn PDF document text
    • https://wadenipix.weebly.com/uploads/1/3/1/4/131408068/9450301.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144417717/cabrio_washer_error_codes_f5_e3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98cf8226-ced6-476f-939c-8af7487a6fe8/how_do_i_enable_dolby_atmos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554e7008-a4ac-46d9-aa64-65f02193ba9b/how_to_become_a_first_aid_officer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86855be1-e8b7-4d40-a1d8-e59ecfbb965c/mercantile_law_notes_for_bcom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa8688a-37ee-454e-ad2a-ed1c48106de9/88706022604.pdfIn PDF document text
    • http://zudilazo.pbworks.com/f/need_for_speed_no_limits_offline_apk.pdfIn PDF document text
    • http://jijagenaneke.pbworks.com/w/file/fetch/144438639/jofax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633d03e9-c761-4771-85d0-f5b444a46e04/temiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1425791f-0568-4bd8-a5e2-76a74e078e50/how_to_become_a_lefty_if_youre_a_righty.pdfIn PDF document text
    • http://naxoxututal.pbworks.com/f/moginudamilumopatixawuzi.pdfIn PDF document text
    • http://jakomija.pbworks.com/w/file/fetch/145011225/ratakejadorogoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1c24ea-405f-43c6-8a17-738caaceee11/larousse_gastronomique_download_free_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c28acf-54db-44c5-9a39-347245b3ef0a/jipuxuvupolafigenom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d19d0ba-aec7-4586-b817-74158b3102a5/suvenekowaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7ae070-60b9-476d-9bbf-5bb2850d85ad/what_are_minor_games_in_physical_education.pdfIn PDF document text
    • http://karulimomaw.pbworks.com/f/sampling_without_replacement_statistics_definition.pdfIn PDF document text
    • http://pejokawigar.pbworks.com/f/97406228985.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_off0000e1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E0 5140 bytes
SHA-256: c072a33629117352436325cd5a7a5078eb691cc7c6af466440c55767cebebf7d
font_01_sfnt_off0000f362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF362 11156 bytes
SHA-256: 3bc75e59f58bbb5a37a3d105cc2aa40582aec60a34ad0ddf337172ba8112d2e4