Malicious PDF — malware analysis report

Static analysis result for SHA-256 faae23fe8bc92746…

MALICIOUS

PDF

77.7 KB Created: 2021-03-12 21:24:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aa85845f2d11d19edff729f405c67647 SHA-1: b8a91522e6803c3e9f6b34fe40f85401bf7f6b16 SHA-256: faae23fe8bc927465d0b359f48b044c39210821ac3b6df4fcbf750cf98a82ef2
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 0.9960

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
  • 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://botokaw.ru/award?keyword=against+the+wind+sheet+music+pdf PDF link annotation
    • http://balifruit.com/virginia_woolf_the_waves936qj.pdfIn PDF document text
    • http://rejonanujezeke.22web.org/dd-_wrt_openvpn_configuration_guide.pdfIn PDF document text
    • http://afracheat7.xyz/bujemadubatinafiris8bcnx.pdfIn PDF document text
    • http://organicsss.space/full_body_workout_spreadsheetcsk5r.pdfIn PDF document text
    • http://instapriz.site/2000_club_car_ds_lift_kit_combomfc5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/loneminovu/mathematical_statistics_ii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9a7d76-7c5d-4891-97d4-01661b67df94/google_site_reliability_engineer_salary.pdfIn PDF document text
    • http://lodufuvu.epizy.com/design_system_reporting.pdfIn PDF document text
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_911e1158f1d6476eaa1852864cdcb3e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/accf_aha_heart_failure_guidelines_executive_summary.pdfIn PDF document text
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_8eb4f6e2fcb04c5fbf36984bdfb29707.pdf?index=trueIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_fc969ff0ba1248c39c386a086e211795.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/duke_energy_report_outage_map.pdfIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_6bfb5c1f43b84e15962bd854ed5069a0.pdf?index=trueIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_521644dc1d764922ad0a2d407d658630.pdf?index=trueIn PDF document text
    • http://gebuzabode.epizy.com/komplikasi_abortus_inkomplit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69b3a256-9f10-45c0-8631-1d8310d94958/visoxupajiwevubekonubal.pdfIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_0f8336b1d94a439f9a38b3ef29930d92.pdf?index=trueIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_d0b8d590e73c44e6871a6d230f36bb9b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/afb12c60-00ee-4597-a556-f95d3faa45d3/alexander_the_great_nicknames.pdfIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_519a0a6e5fc048e49734dd7d4be12fa9.pdf?index=trueIn PDF document text
    • http://pamakejexo.epizy.com/difuwalomowonuxov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92cf2d9f-5a9d-499d-9b52-5492875d9f10/bash_scripting_learning.pdfIn PDF document text
    • https://da89e6ec-52f9-4c28-8de8-447a2e923c0c.filesusr.com/ugd/5e5b2a_f111c4b6605e4d5db0883890af161fcf.pdf?index=trueIn PDF document text
    • http://kagiwabiluwotel.epizy.com/torsion_in_gastropods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a9c6c31-85d7-44ad-a9f8-f1291f9a605a/pivipivetiduraramiwal.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_off0000f36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36D 5524 bytes
SHA-256: 2524b677eb8df5fd768cc23a01afe2c271021051b47d99c75bf356118443dbe3
font_01_sfnt_off0001062f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 10228 bytes
SHA-256: 5e42ef894317f49671c93e51d9bdd389205941832cf65cdfa9356a14c8b3b06c