Malicious PDF — malware analysis report

Static analysis result for SHA-256 6017b15a7a5f47d0…

MALICIOUS

PDF

80.6 KB Created: 2021-03-14 23:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2ec4df53606a2eb4265ef7e65f152bc4 SHA-1: ac52aeea4d713a14e210daae689759f2f2d79b67 SHA-256: 6017b15a7a5f47d08f3aed9d079a0a358a89823cf9972f1a65db1b028095ad92
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/123?utm_term=convert+pdf+to+word+document+online+nitro PDF link annotation
    • http://obsluzhivanie-kompyuterov.moscow/boehringer_ingelheim_pipeline_2018sbopo.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/hfieihq/69435565667.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/jgogjif/77010282515.pdfIn PDF document text
    • http://my-favshopf.online/55574808013b4e5y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454041/normal_6000e6ba4d4c9.pdfIn PDF document text
    • http://salebox.shop/dell_e7450_i7_5th_genoxhpm.pdfIn PDF document text
    • https://lemarowaverixax.weebly.com/uploads/1/3/4/3/134371099/653c40c1ed12b9.pdfIn PDF document text
    • http://podipotekoi.ru/generali_pio_casinalbo_di_formigineg9tpv.pdfIn PDF document text
    • https://pugubitef.weebly.com/uploads/1/3/5/3/135302221/caf5230d.pdfIn PDF document text
    • https://cdn.sqhk.co/goseluna/iLXUxdE/61415977771.pdfIn PDF document text
    • https://fupelesanu.weebly.com/uploads/1/3/1/6/131606305/7136272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_600d396fedc6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_601e51a05bf95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7486ab8b-7b69-4a4f-bfe1-101b37afaa03/tisozojenel.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_69fb1b8090af4c5fa72ab574a152e644.pdf?index=trueIn PDF document text
    • https://4dd4a32c-aced-41d2-87e6-7ff9ca8080d7.filesusr.com/ugd/6d6f33_d92be7c1a67b44f5964d80741be9e96e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcdd5108-90ee-4a84-8c35-3bda68e00d53/baby_girl_names_that_begin_with_a_z.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_48c732ee0ce54fde9039bc39f18cef2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd66864e-ecf0-435b-bcdd-26f3ca214b2a/university_of_colorado_boulder_electrical_engineering_graduate_application_deadline.pdfIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_8e134cbedba8496f8d11f744b41e1271.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb238735-d95d-4a8c-a070-3d2bf0d9d0fc/can_you_connect_multiple_bluetooth_headphones_to_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74d6580f-62ff-479d-b2ba-c673c84593e5/m5a97_r2.0_bios.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 4972 bytes
SHA-256: 4644f85596bcb6572db2bfb76bc20d0a353f9a046d8ea9efb8422106b80deb32
font_01_sfnt_off00010134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10134 10980 bytes
SHA-256: b7a4c3e7a8d19cbd39c77a0ade807e5b36b5f4b83e651a5f339c2c6903b56bdf
font_02_sfnt_off0001268e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176