Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1163c26ab45ef5d…

MALICIOUS

PDF

73.6 KB Created: 2021-02-26 11:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ca22da9d280d80c569f2bd6e0e9a6478 SHA-1: 32c18c120c51c914047500ea1f337caf207cefe9 SHA-256: d1163c26ab45ef5d9ee3a725241b869984672dda742c6bc3c5284b6f46797e2c
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple external links, with one specifically pointing to a URL containing 'award' and a game manager keyword, suggesting a lure. The 'SE_CLICKFIX' heuristic indicates social engineering to trick users into running commands, and the ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded JavaScript, though not directly analyzed for specific actions, is often used in PDF exploits to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/award?keyword=big+fish+game+manager+windows+10+deutsch PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384308/normal_5fc8943382717.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/what_are_the_ninety_five_theses_of_martin_luther.pdfIn PDF document text
    • http://trellos.fun/metal_slug_5_character_selectekaxo.pdfIn PDF document text
    • http://detonic-deutschland.website/the_over_40_hormone_reset_diet_review8xzcz.pdfIn PDF document text
    • http://wekeb.space/progression_daccords_piano_gospel77hmo.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/bissell_lift_off_multicyclonic_pet_vacuum_filters.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/ea9oqgi/final_fantasy_heroes_name.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/mini_dv_camcorders_for_sale_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/jigidokasaga/rgjSzhg/gixuronamafutine.pdfIn PDF document text
    • https://cdn.sqhk.co/kelulegawi/uzjcPjj/nivegaraluguf.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/printable_weight_loss_chart_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuzuxutetug.atwebpages.com/how_to_interpret_standard_deviation_scores.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/51494724299.pdfIn PDF document text
    • http://girofili.myartsonline.com/the_white_princess_season_2_dvd.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/kepafezubalazibo.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/76580487963.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_off0000e238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 5740 bytes
SHA-256: 1ffe62766379647271a7fe0790d7c723c6a778c4ffc8e30edda378e1e083278a
font_01_sfnt_off0000f5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B9 10240 bytes
SHA-256: bd54c5e221516d6965f0769fc0d07cfbb26995c8c8f004b332e8b35681b64713

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