Malicious PDF — malware analysis report

Static analysis result for SHA-256 01434280662e15c3…

MALICIOUS

PDF

86.4 KB Created: 2021-02-20 20:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 456a2916f4e2ff4d97066e215c8a1c48 SHA-1: 229f0762f5f7f04e5e1f250b95027f775244cc27 SHA-256: 01434280662e15c3cc1c95ec0d0997afb31d4f009c968e7ccb2592d0d13a2c22
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=emotion+faces+coloring+sheets PDF link annotation
    • http://tomerezadix.iblogger.org/best_graphic_design_app_for_android.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/vabawopofimedilego.pdfIn PDF document text
    • http://sasavojaraw.iblogger.org/22835618627.pdfIn PDF document text
    • http://xivatididoxu.22web.org/37725596401.pdfIn PDF document text
    • http://vipadminler.org/dungeon_keeper_2_windows_10_download82ppp.pdfIn PDF document text
    • http://instapriz.site/ilovepdf_picture_tokol5p.pdfIn PDF document text
    • http://ukranews.icu/smartsheet_dashboard_example45yrf.pdfIn PDF document text
    • http://reweder.site/zaripozep1jn4g.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/infographic_excel_template_freee3bb6.pdfIn PDF document text
    • https://bovaxomasomi.weebly.com/uploads/1/3/1/4/131437143/0f774b2337.pdfIn PDF document text
    • https://zekorawuj.weebly.com/uploads/1/3/4/8/134862422/1cbf218d8aab1.pdfIn PDF document text
    • http://gnoogle.site/lusagamofexiwi4e2us.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/sopogazitoxazetug.pdfIn PDF document text
    • http://zizakipu.epizy.com/wwe_battleground_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/aluminum_alloy_rolled_sheet.pdfIn PDF document text
    • http://vufavaxotajoba.epizy.com/avatar_korra_episode_guide.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000fe0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0F 5252 bytes
SHA-256: 43d57d215f37ad0961beaea64122fa0c0cba2dea5c7a892a4f94ea348eee8d64
font_02_sfnt_off00010fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBE 11008 bytes
SHA-256: 22a1c203a7044f36f9703d94f9b3bbb84f69dcc0affab8854ca590e08e437cf5
font_03_sfnt_off00013535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13535 16520 bytes
SHA-256: 55f3254e2998e35a915c5bfdb381ecfdd712e4fd9afdaa7318c50ecb29daac5c

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