Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81b1d8c22278a07…

MALICIOUS

PDF

76.1 KB Created: 2021-03-13 13:57:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f573aee820c4964edf76c5dff79146b0 SHA-1: ed27349ad1414d56ffb725c7dac47452e0681cb2 SHA-256: f81b1d8c22278a0751217e1bd90a6ebcf999997081715631223988f5ef4ac89c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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 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://midufefew.ru/aws?utm_term=lola+and+the+boy+next+door+full+book+online+free
    • https://cdn.sqhk.co/jipogidara/mgijihf/zozitilenozupidu.pdf
    • https://revasarubon.weebly.com/uploads/1/3/5/2/135295272/2495457.pdf
    • https://cdn.sqhk.co/bepeguvovori/jge3ibb/fidevefumumaru.pdf
    • http://prizinsta.info/beats_studio_3_wireless_white_and_red24gma.pdf
    • http://tuvivukaroj.mygamesonline.org/45083384088.pdf
    • https://cdn-cms.f-static.net/uploads/4506131/normal_601b54161e7c2.pdf
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/c415a6dcf2eeb.pdf
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5fe1c9bdef603.pdf
    • http://masajsalonunuz.com/adobe_photoshop_tutorials_for_beginners_step_by_stepbv2kx.pdf
    • https://cdn.sqhk.co/pigalixow/qMFYhjr/canvas_student_view_comments.pdf
    • https://cdn.sqhk.co/pisomuwesuk/i09ifuy/acca_f5_bpp_revision_kit_2019.pdf
    • http://car-den.ru/how_to_connect_directv_to_centurylink_internet1mdhz.pdf
    • https://cdn.sqhk.co/nixagigad/Hjhg7BM/79255551774.pdf
    • https://static.s123-cdn-static.com/uploads/4475728/normal_5fe598860114a.pdf
    • https://cdn-cms.f-static.net/uploads/4444123/normal_5fe81315ae303.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vezapuro.rf.gd/cute_baby_images_free.pdf
    • http://wawebepibalura.epizy.com/aisi_304_material_properties.pdf
    • http://wareguw.atwebpages.com/afcat_1_2020_question_paper_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec31.bin
9f563945f7c033d56126e136b621c5d51479b4494c5c3e302de9a5019a8abc08
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC31 5132 bytes
font_01_sfnt_off0000fdad.bin
7a8cb2be8ccf801e87e0a769e0a787cfc84ff1fd53c0de13ce2f02d178ab5834
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAD 10992 bytes