Malicious PDF — malware analysis report

Static analysis result for SHA-256 327d80fc70704122…

MALICIOUS

PDF

72.4 KB Created: 2021-04-20 08:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 007d66cbf6e85d1584122b140a642005 SHA-1: 952d006e2bb1897b084c0b98f35b9d45cc1d6612 SHA-256: 327d80fc707041228eb34e17d490bf06e628cf51066ad41c5c57a5a55dc33999
184 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious, suggesting it is a phishing attempt designed to lure users to malicious sites. While no scripts were extracted, the presence of numerous links and the critical heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=hp+envy+4500+ink+cartridges+tesco In PDF document text
    • http://odebayitrafikhizmeti.com/beast_quest_series_4-_66c98f.pdfIn PDF document text
    • https://vetetomo.weebly.com/uploads/1/3/4/0/134000119/f5fdc26a9d.pdfIn PDF document text
    • http://apsmall.space/12824761050l9lm8.pdfIn PDF document text
    • http://straponartist.com/anne_rice_the_witching_hour_books7oucg.pdfIn PDF document text
    • http://matadidofedokod.22web.org/rii_mini_x1_wireless_keyboard_2.4g_flying_mouse_handheld_touchpad.pdfIn PDF document text
    • http://wivejudotimog.22web.org/13_colonies_map_worksheets.pdfIn PDF document text
    • http://axacheat4.xyz/is_the_worx_trivac_cordlesscddkd.pdfIn PDF document text
    • https://zogoporev.weebly.com/uploads/1/3/1/3/131381602/gedunobaxibi-xawetup-waruxetesolef-nidujugu.pdfIn PDF document text
    • http://vkrowl.com/price_of_skyworth_tv_in_nepalcs258.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/3OhfjjZ/temepaxulikidola.pdfIn PDF document text
    • http://big-ita.space/puvinawijiresonunenurolaq28ey.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/njchghc/wuzesukanola.pdfIn PDF document text
    • https://palekanino.weebly.com/uploads/1/3/4/3/134372766/9754987.pdfIn PDF document text
    • http://espacecmb.xyz/ps_vita_charger_cable_cost1axw6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mazogatu.epizy.com/fencing_pool_score_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7188ff0a-74d2-4b8e-856f-04dcdda454c3/pitonazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0031025a-f024-4722-8156-aa1a4b014c7d/welutanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc86c874-9687-485a-8717-910ac93a5f96/19525548465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8c7d7a-8d97-430d-996a-23d32c6be076/malcolm_x_speech_the_ballot_or_the_bullet_analysis.pdfIn PDF document text
    • http://vinegufoxa.rf.gd/fuvexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22990b16-0ea5-4d8d-994f-a7c286510c72/period_of_repolarization_of_the_neuron_during_which_it_cannot_respond_to_a_second_stimulus.pdfIn PDF document text
    • http://pisubepajolosu.rf.gd/technical_analysis_books.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_off0000dac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC1 5748 bytes
SHA-256: b8497fe5bf98316329f5bbe3e645bc3c12531274a786fa7fde1919622bb8cbdf
font_01_sfnt_off0000ee83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE83 10972 bytes
SHA-256: 667cada766a4e91a409cab93789b469324759136abac6ad28471b6477dee64ae