Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1537e3134bdd82…

MALICIOUS

PDF

68.5 KB Created: 2021-03-24 22:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e399e60a4b1ab9dbe3d42c4f36d8a51a SHA-1: 907be48d64cd3804fbb57810204bc76bbfa63c0f SHA-256: 9b1537e3134bdd82880b8e1e4603357a07f2d2d75297cab48e1793edf294dac8
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 0.9992

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://jottigo.ru/strik?utm_term=polycom+soundstation+2w+power+cable PDF link annotation
    • http://kavademive.sportsontheweb.net/sabodafekefumid.pdfIn PDF document text
    • http://bizbize-yeteriz.org/vapamexikoabltk.pdfIn PDF document text
    • http://imedo.ru/que_viva_el_amor_translated_to_english5qjb6.pdfIn PDF document text
    • http://suniwenejuwodel.iblogger.org/23334952373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5fcf0a644d042.pdfIn PDF document text
    • http://airet.space/96350856593j6zp6.pdfIn PDF document text
    • http://takaweri.mywebcommunity.org/printable_periodic_table_2020.pdfIn PDF document text
    • http://grafoanaliz.ru/douglas_adams_hitchhikers_guide_to_the_galaxy_audiobook89vi2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382620/normal_5fc6580c8562b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_6053843d75620.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/sample_welcome_speech_for_seminar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467577/normal_5fd85e2199c6c.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/cc114f34-21be-4eaa-85ce-f54a10e0d8d0/reiki_courses_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68578a3e-55fe-43f9-bcd7-2f1bd6e6765b/28282342946.pdfIn PDF document text
    • http://namidonom.epizy.com/66264188209.pdfIn PDF document text
    • https://a35b4eae-300a-44a5-b982-8d633984e519.filesusr.com/ugd/19735e_f1d303a16bc44193a8577333d5d559a2.pdf?index=trueIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_e822b95b0a3640848c4b70d064a08c34.pdf?index=trueIn PDF document text
    • https://71bfc0c6-4bef-405a-aee6-9e9dcaab3d12.filesusr.com/ugd/708cfd_4841a82dfaa1434295a759b6651c18c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e465200-f6ac-4ac1-a605-8a48cb4a62d5/briggs_and_stratton_vanguard_16_hp_oil_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87df26f-a47c-4410-a60d-f8557dcbf76b/ranedov.pdfIn PDF document text
    • http://mogigolutatuliz.rf.gd/alimentao_saudavel_trabalho_escolar.pdfIn PDF document text
    • http://jujovotusenugo.epizy.com/travelport_galileo_guide.pdfIn PDF document text
    • http://badivisixeg.epizy.com/shazam_new_trailer.pdfIn PDF document text
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_09d225a6def4450b8094e2ad43e0d2cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2135ed6f-bea1-4975-af72-66f02ae48953/moxelipusonenuzoligomim.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_off0000cdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD3 5688 bytes
SHA-256: 994267d048943e0b4c1ffab25ce37ce6fef8703427b199444e94499e17df2b02
font_01_sfnt_off0000e126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE126 10332 bytes
SHA-256: 7c931b28ee922e5242c168aa5bd92bae340306fe42674f86f613c35e73230836