Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f10b8ed1951763…

MALICIOUS

PDF

74.4 KB Created: 2021-03-16 07:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9e55219d12de66abef084e435082b2e4 SHA-1: 2d24ea9432d01a315daa4b54fbd7b49a70491857 SHA-256: 75f10b8ed195176363ca71634f7755b34e33b491a3ac244549a6a2ff6733bf34
146 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a callback phishing lure, prompting users to call a number for a fake issue. While no scripts were extracted, the presence of external URIs and the overall detection suggest a phishing attempt, likely delivered as a spearphishing attachment.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=red+card+soccer+meaning PDF link annotation
    • http://jedusajinud.mygamesonline.org/how_to_set_mxr_10_band_eq.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/GBvifIv/8751632230.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/1gjhfKl/lidiruku.pdfIn PDF document text
    • http://pekibexuvipeve.scienceontheweb.net/divergent_movie_download_in_hindi.pdfIn PDF document text
    • http://lerawutevokaj.iblogger.org/49934666908.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb1ed46-af69-455f-87e0-b8c36e1294af/49322449950.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/government_chief_information_officer_certification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a37188-a2d2-411b-b4e0-9ef440002c75/67500921220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/720497f8-3557-4e04-9747-1466a4b5d1bf/40839337029.pdfIn PDF document text
    • http://jejuton.rf.gd/my_ishmael_audiobook_free_download.pdfIn PDF document text
    • http://towawemigegi.epizy.com/valukuxexutogupoligaruxo.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/40712986164.pdfIn PDF document text
    • http://rosuwofa.rf.gd/20572025538.pdfIn PDF document text
    • http://dodarululi.epizy.com/add_items_to_combobox_c_winforms.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/asbabun_nuzul_juz_amma.pdfIn PDF document text
    • http://sotegoduwibadaj.epizy.com/kobalt_hvlp_spray_gun_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/chloroform_nitric_acid.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/libro_el_secreto_de_selena_gratis.pdfIn PDF document text
    • http://ratazudawi.epizy.com/nadilimisozemalu.pdfIn PDF document text
    • http://rupeguv.epizy.com/dojinovu.pdfIn PDF document text
    • http://bezopiwuzalobit.rf.gd/electro_optic_systems_annual_report.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_off0000e749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE749 5232 bytes
SHA-256: bf7eb0df943640bab7e8818a0806f2118256a7a0dca6b009c6be9a48ff16defc
font_01_sfnt_off0000f8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FE 10620 bytes
SHA-256: 7ce1fae0c26713fd84af2a9fb397df35705266be704a798316d6d9cfc87a7491

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