Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7822c3c32da6195…

MALICIOUS

PDF

81.4 KB Created: 2021-03-10 00:39:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f7886976cc46e20723909655500751 SHA-1: d40794f301a2f3aaf563f3e0602c05dec2fe10bc SHA-256: f7822c3c32da6195b629a584271446fdf13886e23eb152ab27bb9263095c1f74
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The PDF functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/aws?utm_term=whirlpool+heavy+duty+thin+twin+gas
    • https://cdn.sqhk.co/nobixapo/LjitAhe/bepudakevajozamavopidonid.pdf
    • http://ripugusulufiluj.getenjoyment.net/electrical_telemetry_system.pdf
    • http://impergamon.com/sims_3_store_content_free_reddits74x1.pdf
    • https://static.s123-cdn-static.com/uploads/4402519/normal_6003eadab03e2.pdf
    • http://ritixibetono.mygamesonline.org/51456656416.pdf
    • https://cdn.sqhk.co/bodorosuzuta/djbhcMu/torn_meniscus_treatment_surgery.pdf
    • https://cdn-cms.f-static.net/uploads/4463300/normal_6047f6453f28d.pdf
    • http://usecabinets.xyz/bose_companion_2_series_iii_multimedia_speaker_system_pc6fzj0.pdf
    • http://mir23.xyz/music_player_bass_booster_2020_apkc9t0f.pdf
    • https://cdn.sqhk.co/jaxogubajo/fQTobg0/14763799180.pdf
    • http://googsnat.space/majijekexobuka9q46r.pdf
    • https://cdn.sqhk.co/jaxubefe/aifvIqP/gutufotadefoxugifurixomiw.pdf
    • http://teenagetutor.online/6201141669eqmej.pdf
    • https://cdn.sqhk.co/loganidob/dfTrKDq/top_up_my_tesco_sim_card.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a5e2735a-9724-4d9d-8181-e3030fbaaf16/60167457585.pdf
    • https://uploads.strikinglycdn.com/files/1943b3c4-b4dc-45f4-b2cb-7a8cd73052ff/fomifulom.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe1e.bin
df8d8a94cebbcc4e86d04cd758e4d555b68e25df56d92d4c14a2d445459113c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1E 5488 bytes
font_01_sfnt_off000110e2.bin
48c719de74b07dd1b69db50a46e220a5cc32b695727b7275f0718fa379840903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110E2 11892 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.