Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1e29e0c8d620dc…

MALICIOUS

PDF

69.7 KB Created: 2021-03-21 10:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 32ecf0ddaeebf9445409b5cf8dc11aad SHA-1: 7aa0c3d9af6004b761837ae3efd5c6a118e3a5a9 SHA-256: aa1e29e0c8d620dc99ca974cf19e6f133886389c0eae68644397508b1567377c
184 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically for containing links to known malicious redirectors and disposable hosting. The embedded URLs suggest a phishing or content-luring attack pattern. While no scripts were explicitly extracted, the nature of the PDF and its links strongly indicates it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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/123?utm_term=kaththi+villain+theme+ringtone In PDF document text
    • http://dirtygirl.fun/97104744665e0wgg.pdfIn PDF document text
    • https://cdn.sqhk.co/menodotitit/dhg2ibi/virtual_dj_mixer_for_pc_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/jaJthgg/62846167531.pdfIn PDF document text
    • http://yarrebitteh.online/how_to_change_battery_in_samsung_galaxy_4_tablet30le2.pdfIn PDF document text
    • http://davufemalolaj.iblogger.org/asus_xonar_d2_drivers_windows_10.pdfIn PDF document text
    • http://acupofjacob.com/how_to_change_pump_oil_on_generac_pressure_washery1e62.pdfIn PDF document text
    • http://petersikdar.com/912935918224szub.pdfIn PDF document text
    • http://soldonlittleton.com/electric_circuit_diagram_of_water_coolerc64qz.pdfIn PDF document text
    • https://cdn.sqhk.co/ladatiziz/hc8Cxhi/adobe_after_effects_32_bit_cs5.pdfIn PDF document text
    • https://cdn.sqhk.co/latusetime/ihgghbu/47468951906.pdfIn PDF document text
    • http://csxmoney.info/396694274789es2f.pdfIn PDF document text
    • http://molotkov.site/vunolosovogoligakvkga.pdfIn PDF document text
    • https://cdn.sqhk.co/pememobuwir/ha1TKij/mario_kart_3_stars_ds.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/CxKojhz/snapping_shoals_covington_ga.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/37e97f6b-ec3c-4b38-bd35-5874c62f9b93/83445808538.pdfIn PDF document text
    • http://wovefekekixuji.rf.gd/introduction_to_law_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b4576a-e7bc-44e9-8c1e-705df3072bb5/pawar.pdfIn PDF document text
    • http://lojosuxotugades.epizy.com/apache_tomcat_9_for_windows.pdfIn PDF document text
    • http://xikekopovo.rf.gd/28375507199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd593ea-97ee-4033-add8-9c3b62be1af9/tai_chi_classic_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b29589-0d58-4488-8eac-5d49416e6d2a/derugalazujuwe.pdfIn PDF document text
    • http://vudagolefedofa.epizy.com/pubex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b058cde9-72f5-4bdd-a90a-3fd8b451563b/non_programmed_decision_making_techniques.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_off0000d37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37F 4948 bytes
SHA-256: 8aeba56114a93aa2dce9cbb0cad9fb1365aad4bf04c1ac63fad900b6c30bb327
font_01_sfnt_off0000e438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE438 10892 bytes
SHA-256: ac084640bf452e94e6709ee015b11d9e6eb402666429fe89b3856cbbdd04483c

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