Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc1751bb45feb1b…

MALICIOUS

PDF

85.0 KB Created: 2021-03-07 17:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 459dda92906659e5fd3bcc190fe76bc3 SHA-1: 492ee69c3decd80a659e83d9cfb6c0bd08f783af SHA-256: ebc1751bb45feb1b0aa65037ebcd4c91020d18d78458a31cc89ab0b2f26017fe
226 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The presence of the 'SE_LOLBIN_RUN_COMMAND' heuristic suggests potential execution of commands, possibly involving tools like 'curl' to download further content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://xajibur.ru/wix?keyword=2000+ford+super+duty+fender+flares PDF link annotation
    • https://miduginoxem.weebly.com/uploads/1/3/4/8/134892771/xivolonibilebaz.pdfIn macro / runtime command snippet
    • https://sukizasatesez.weebly.com/uploads/1/3/4/6/134686833/9245112.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/jihfidg/simple_project_timeline_template_excel_free.pdfIn PDF document text
    • https://nuzojumikosa.weebly.com/uploads/1/3/0/8/130814298/06a53230981ddde.pdfIn PDF document text
    • https://janusizexagelu.weebly.com/uploads/1/3/5/3/135337128/kezolonojida.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/jetuvapeva-dobagixoma.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/iii6ibB/the_world_of_magic_guide_for_ranger.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/jdZhjmM/bubble_trouble_pop.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/Y8iehPs/download_no_crop_and_square_for_instagram_apk.pdfIn PDF document text
    • https://feropozu.weebly.com/uploads/1/3/1/4/131454035/3112399.pdfIn PDF document text
    • https://wewodagib.weebly.com/uploads/1/3/4/2/134266566/texutuvolijurabe.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/9102739.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
    • https://s3.amazonaws.com/vuzufexarevima/dupebovixedon.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/graphing_quadratic_equations_worksheet_kuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78516d4e-5432-4442-a22a-f2c23674cf1c/the_divergence_of_a_curl_is_always_zero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f65a6484-b26f-4ab1-8f67-7581bc6d05e2/93613962102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e585bd0-4466-430b-ba56-94d937d514ce/why_is_my_hp_scanner_only_scanning_one_page_at_a_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1665f259-54f5-4d79-ae4f-e239510e4ee7/19124208266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4866a835-b220-4a54-a4ca-418bc778f679/93017310125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3f0424-c2dd-4614-9512-ad09fb9e3867/oster_regency_kitchen_center_meat_grinder_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/27413898707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab168a2-74d4-4ede-b924-b1abf8a153d4/what_is_the_best_apple_mouse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f42de9-9511-4103-a832-3b507d47b963/2600026492.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/reporting_results_in_quantitative_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e05e8de-ad46-49e2-aa06-18c027146a8a/gixukadivibugijiredil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9f8b89-016e-4dc1-a235-cb6168f22af1/66782388949.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
    • https://uploads.strikinglycdn.com/fiIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 5148 bytes
SHA-256: 2fea8eeda96883bd4c2a798f9154fa9f116d0303e0027b946c66d673938ff581
font_01_sfnt_off00011493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11493 10472 bytes
SHA-256: 85f87267d8cea7256ca2568d9e4bc65529279fe9a9d4ec961b529a6e56d2fc88
font_02_sfnt_off00013853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13853 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e