Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e9ceca9cceaab1…

MALICIOUS

PDF

79.3 KB Created: 2021-03-01 00:59:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 42774d8b95ce4b72ea9cb68d45e9596d SHA-1: 3bd79b40eebf0f5593aaf5bcf1d2ce76327a2591 SHA-256: 60e9ceca9cceaab1ef1e81d000f211f504ec2b4d3911726c23f89e45fb8c9b63
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=basic+concepts+of+database+management+system+pdf PDF link annotation
    • http://mmamba.ru/kabatewipititofigegozuxv7p9l.pdfIn PDF document text
    • http://tublitalia.space/didiweo8xqe.pdfIn PDF document text
    • http://chestlune.online/velodrome_track_material6k8mj.pdfIn PDF document text
    • http://criticcxck.space/26672618490ncm67.pdfIn PDF document text
    • http://fastpysystem.online/ps4_emulator_download_pc_version_3._2._13cpt8.pdfIn PDF document text
    • http://cafechorsu.ru/74973774293bsjf.pdfIn PDF document text
    • http://catsism.com/flight_radar_24_pro_apk_full_2019xit3d.pdfIn PDF document text
    • http://cooldomen.space/best_grass_cutting_service_near_meu1429.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/1359707.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fojamemu.epizy.com/mowupaza.pdfIn PDF document text
    • http://gaditerigasut.rf.gd/cisco_2960_l_switch_datasheet.pdfIn PDF document text
    • http://zizekag.epizy.com/susemuperumok.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/how_to_write_meeting_minutes_email_template.pdfIn PDF document text
    • http://suxijiwuxupan.epizy.com/chevrolet_cruze_2013_service_manual.pdfIn PDF document text
    • http://vodadusilop.rf.gd/blood_pressure_readings_chart.pdfIn PDF document text
    • http://tovujopojat.epizy.com/baveniwawaxiwenov.pdfIn PDF document text
    • http://deroluzotuz.epizy.com/toy_soldier_prc_148_radio.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_off0000fa13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA13 5640 bytes
SHA-256: 4a166beeb6783bffc68ba376f5ccec8ea6e5ac2ab1c5786fbc6021a0c03bef48
font_01_sfnt_off00010d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3E 10064 bytes
SHA-256: 0c37b7d1d439b0e4963efef7ebb595e5b8c470afa0b36850d2bd9eb59ab356f9

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