Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b8c8d2c04d910d…

MALICIOUS

PDF

70.4 KB Created: 2021-03-27 20:18:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6181907372fb364297002c44cd4eac8f SHA-1: b2f5cdfb24ac0bef627b74c8f189c299abf1772e SHA-256: 97b8c8d2c04d910d09b603b6286871300e6ad8b3d346acc3b3142be966136542
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. It contains numerous embedded URLs pointing to suspicious domains, suggesting a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates the PDF is designed to host many links on disposable domains, further supporting the malicious intent.

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://druttle.ru/wix?keyword=better+world+shopping+guide+2018 PDF link annotation
    • http://sun-italy.space/bacterial_infection_disease_treatment_during_pregnancyyyqmd.pdfIn PDF document text
    • http://adminhalil.com/95319703711ztz33.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/UZibigT/rogue_soul_2.pdfIn PDF document text
    • https://gavokafiwafez.weebly.com/uploads/1/3/1/3/131381231/kureni_rolod_xalemukob.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/jhjPifW/switzerland_currency_vs_euro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_6043740833533.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405414/normal_5feb0e0c30d7c.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hgHCAhd/myth_defense_2_df.pdfIn PDF document text
    • https://jexujomasok.weebly.com/uploads/1/3/5/3/135343442/xebemepuf-wudarag-kujesinuri.pdfIn PDF document text
    • https://bireguvax.weebly.com/uploads/1/3/0/7/130775683/7350034.pdfIn PDF document text
    • https://cdn.sqhk.co/vibefoparo/3s3MPgi/68408032858.pdfIn PDF document text
    • https://cdn.sqhk.co/guzufaseba/ghMXjaH/rutumoxerobo.pdfIn PDF document text
    • http://getdouche.xyz/how_long_does_it_take_to_charge_a_black_and_decker_jump_starterjn311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488315/normal_602fe12c0e9e7.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/android_gameboy_emulator_link_cable87xxs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_60376b0ec22da.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/1cdcfac4-5e54-4a29-8115-948c9b5383bf/rimigizerifulubeb.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/how_to_do_expository_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f377d15-011e-4773-8c59-3f1b739ebf5a/76123757264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea9e6c28-ae44-4073-9f1e-03d65949081c/32732329696.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/latavugegebuzubazeja.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/40344447582.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/watch_the_westing_game_movie_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36bbf6a0-58a7-4b98-bcfc-49db8539f81c/the_other_side_of_the_door_tamil_dubbed_movie_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/printable_butterfly_worksheets_for_preschool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc406fb8-0e92-44fb-a08f-8d8236582692/interpreter_of_maladies_a_temporary_matter_setting.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_off0000d55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55B 5672 bytes
SHA-256: 6cf2e8ddeed0c8f53c01059fccc25b79de3cbb88c7f9294da7628a45955ee494
font_01_sfnt_off0000e8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C3 10264 bytes
SHA-256: e9449bdf7963a5ab36477b92a3159ee2e82c6d3f33facc48b976d8f5b5a7794d