Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4fc758d61e1e17…

MALICIOUS

PDF

80.5 KB Created: 2021-03-22 15:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 967f07b57ee9598ca98889630a3eae7f SHA-1: 510c15c6de6fd8b6e09b253a991b461f915c6688 SHA-256: fd4fc758d61e1e1731ad9c27f1749f3251e10264a297fd1c52f2d4bd392f0b53
126 Risk Score

Malware Insights

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

The PDF contains multiple external links, with one specifically targeting resume templates for software engineers, suggesting a social engineering lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://ponafet.ru/123?utm_term=resume+templates+for+experienced+software+engineers PDF link annotation
    • http://manuximaxemeje.scienceontheweb.net/burnout_estrategias_de_afrontamiento.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/UlY9YTu/classic_arcade_games_tv_console.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/beethoven_violin_sonata_10_analysis.pdfIn PDF document text
    • http://sokadap.22web.org/surah_ayatul_kursi_video.pdfIn PDF document text
    • http://fexuvukenix.22web.org/alliance_x_empire_equipment_guide.pdfIn PDF document text
    • http://apsdd54gfv.xyz/best_free_movie_making_app_for_windowsskzx9.pdfIn PDF document text
    • http://waferaboteb.mypressonline.com/5298772598.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/gihVPje/39672306680.pdfIn PDF document text
    • http://ueuniti.xyz/what_is_the_difference_between_central_cyanosis_and_peripheral_cyanosis53d26.pdfIn PDF document text
    • http://1offpark.xyz/android_bottomnavigationview_always_show_textxdr0f.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/dbahgqt/92284314963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuzelego.rf.gd/84685836612.pdfIn PDF document text
    • http://dokizoj.epizy.com/fidixegenebusiruxevumela.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/hastelloy_x_sheet_metal.pdfIn PDF document text
    • http://biwodonugawodil.rf.gd/synonym_of_discussion_guide.pdfIn PDF document text
    • http://zodajedu.rf.gd/articles_exercise_for_class_5.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/gofaxanani.pdfIn PDF document text
    • http://xogowakowokavuw.rf.gd/heartbreak_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/45663499958.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 5644 bytes
SHA-256: ffb27ac932f272e0f1fd426de0aa30b3bd88a40f44c27cada95319398110bf29
font_01_sfnt_off00010d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D45 12056 bytes
SHA-256: d7b18236c7e39442c3780fde4dd9246d3298ac3683102d2d79237274a7db2c0a

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