Malicious PDF — malware analysis report

Static analysis result for SHA-256 f206e0e6e4f91c27…

MALICIOUS

PDF

115.2 KB Created: 2021-02-12 15:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 727a397a0b21f486bd2d18eaf73245b7 SHA-1: 055dbc5d8a12ecca50215ad73c6894ca8b64e5cb SHA-256: f206e0e6e4f91c2749e400ac63d84161fd6aa37e327eabd8cd44fd3178acbf42
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=high+school+musical+pdf+piano PDF link annotation
    • http://craftsmansmetics.com/ejercicios_resueltos_operaciones_com5adh5.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/jvhbhg0/pocket_color_wheel_diy.pdfIn PDF document text
    • http://vofovadero.22web.org/peletakaru.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/gj6c9rw/75698386892.pdfIn PDF document text
    • http://avit0.pro/double_gun_shoulder_holster_for_saleb5525.pdfIn PDF document text
    • https://cdn.sqhk.co/tubawonidas/gjbidid/winking_lizard_avon_lake.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/Gjcidgg/best_designer_knife_set_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/kojogitu/P1ihGM4/pubarevomerodoj.pdfIn PDF document text
    • http://kexedoliresile.22web.org/how_much_weight_loss_metformin_pcos.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/icMBheK/power_rangers_all_stars.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/ha1I5je/xelezegoxo.pdfIn PDF document text
    • http://all-system7.xyz/draw_your_game_apk_download_ios0vhms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xexewul.epizy.com/dutuguzavojafaso.pdfIn PDF document text
    • http://puwagof.rf.gd/66278678793.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_off0001870b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1870B 5436 bytes
SHA-256: 1930e00a678eb54774d6b5507b92e19e2d973f9f9b5c1dcfd8132fffa156de52
font_01_sfnt_off0001996a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1996A 11424 bytes
SHA-256: f584cd96952d4ffb4b8b84447548c31897a96cc2a3c9258ac9410a28c18911b1

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