Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19bf6539495f769…

MALICIOUS

PDF

102.1 KB Created: 2021-05-18 19:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e06d54d310647a4cb9580620a7e9f6d2 SHA-1: 6d135fa770afc0032372bd6407420932d7cfb0c1 SHA-256: e19bf6539495f769e04c7f80cd9e511b6ed38fc10ee50b7d9d10aec85818b539
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. The PDF contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru', suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for multiple links, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://baarspo.ru/strik?utm_term=anni+y+jasmin+serie+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366351/normal_5fcbdbda4944b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465007/normal_60659a8b321bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393356/normal_5ff6a5898a34c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490380/normal_5ff0e17eec1ce.pdfIn PDF document text
    • http://sowaviwexurejo.22web.org/anger_management_workbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495058/normal_5fda2a35bb6b8.pdfIn PDF document text
    • http://pozonewexoz.iblogger.org/29798167655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479691/normal_600f3bda4bf31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529697/normal_606563c473bf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413111/normal_606375b4c4845.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/4dc79319-60ab-47e4-9e08-de37616e859f/31900626328.pdfIn PDF document text
    • http://napalujimawoz.rf.gd/wesimonumu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/96952440776.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/will_stars_be_visible_tonight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3800f27c-1dac-4aec-9676-f8e4c72eb68f/zevel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25adedcc-3080-45be-ae36-94db0dac3aec/24002683704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090c0337-f4b5-4583-acf3-6b0c3fb22a9e/where_to_buy_replacement_parts_for_waterpik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233ec8ac-4bfa-4028-88e7-0a37c8bdc8d1/how_to_write_an_essay_about_themes_in_a_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/sesotho_gospel_songs.pdfIn PDF document text
    • http://vapasiwivomod.epizy.com/dell_vostro_3670_datasheet.pdfIn PDF document text
    • http://junimuji.rf.gd/chuyen_doi_file_sang_jpg_online.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/keto_diet_plan_for_beginners_free_meal_plan.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A35 8336 bytes
SHA-256: 5de2fa5896e3e22fff01f2b4d99a4255af4b79a7bc062a9290be08c05b5b107b
font_01_sfnt_off000135f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F2 4996 bytes
SHA-256: 68b3c16105e27488ae2ecd6103cb3f30c9f1546abfb4b7691c73acf93851fb78
font_02_sfnt_off000146e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E3 14576 bytes
SHA-256: 590ef17f21e58f714b3a3bfec4372f540e5f9d0efcf08f00ab187bb5607f7d39
font_03_sfnt_off000173f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F3 16456 bytes
SHA-256: 0577a852e355d365c8f645c39952e4cdca1b865e6c425ca0d85bda031547b680