Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9ef96009c2e6b2…

MALICIOUS

PDF

71.0 KB Created: 2021-06-07 13:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c43e2aa26f7ccba69b958e9d1dd75186 SHA-1: f8fde3ca11e703f18e37758a8c1aebbabe579b2c SHA-256: dd9ef96009c2e6b262af69addb32ef98d04cc20cf59549be139452f43c9d3cc5
126 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or phishing campaign. The presence of external URIs and the ML classification strongly suggest this document is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://huntic.ru/pbw?utm_term=heath+zenith+wired+door+chime+manual PDF link annotation
    • https://kisobodowawon.weebly.com/uploads/1/3/1/3/131384145/sowunudobive-selovopuvefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470017/normal_60240f9d6551a.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/3237143.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/57201938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420586/normal_6042f210d3138.pdfIn PDF document text
    • https://dawejufajipamoz.weebly.com/uploads/1/3/5/3/135350304/9d46efae2b1a09.pdfIn PDF document text
    • https://mitegasur.weebly.com/uploads/1/3/1/8/131871816/aea36142f6248.pdfIn PDF document text
    • https://jupelokuxaw.weebly.com/uploads/1/3/4/6/134601506/sirosemerizoze.pdfIn PDF document text
    • https://puwubebuserow.weebly.com/uploads/1/3/4/4/134403982/jojirobofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_6068aa479471e.pdfIn PDF document text
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/543114.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bemulopawed.pbworks.com/f/araba_sevdas_romannn_konusu.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/why_am_i_not_getting_all_my_freeview_channels.pdfIn PDF document text
    • http://pefumugat.pbworks.com/w/file/fetch/144543696/kivunusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e0a8b1-d1ae-4d88-a57b-19e50b183033/how_long_does_a_plumbing_compliance_certificate_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86037a2-5130-4cb2-b508-8db021e0a2d4/keurig_2.0_filter_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a43bf851-dec6-40e2-ad7f-94879d6b1ddc/how_to_set_time_on_armitron_wr165_womens_watch.pdfIn PDF document text
    • http://metudebebi.pbworks.com/f/how_to_come_up_with_a_beer_name.pdfIn PDF document text
    • http://gepefupugalu.pbworks.com/f/xepozewunor.pdfIn PDF document text
    • http://tozuxexap.pbworks.com/w/file/fetch/144517788/kikazinixodew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30038b21-8f17-41c7-9fa0-cb4491f0242b/le_loup_devenu_berger_morale_explication.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/f/batla_house_full_movie_download_filmywap.pdfIn PDF document text
    • http://sejawes.pbworks.com/w/file/fetch/144716070/48703446467.pdfIn PDF document text
    • http://jobojifitin.pbworks.com/f/rental_agreement_format_in_tamil_nadu_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e45ccc-adff-432b-af66-c9cbb49160e0/como_sacar_dinheiro_do_picpay_pelo_banco_24_horas.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_off0000da53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA53 5104 bytes
SHA-256: 230a1684d44fa23ad5fe5823fed3049c90ed00aaea49b642c16ecb50f1d0d692
font_01_sfnt_off0000eb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9A 10488 bytes
SHA-256: 9067a40bb455d1fe86ff1c2ceb92b059f81d805ef90668e6b42211a1d893bd01