Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf9453eb9008d98…

MALICIOUS

PDF

82.0 KB Created: 2021-02-03 00:31:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5c348b76a978c0579ecf11078f9698d5 SHA-1: 482dcde9d748ab6091775cbe5d0f4de838737bac SHA-256: 9bf9453eb9008d9848a872509cbbbb5e9557d177abf8bbe74eb55b7ce9067a5b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, likely serving a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing lure disguised as an exam answer key. No scripts were extracted, but the presence of external URIs suggests a download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/aws?utm_term=aiims+delhi+nursing+exam+answer+key PDF link annotation
    • https://cdn.sqhk.co/texirova/gjgL2s0/dawev.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/uidjjhe/15554523475.pdfIn PDF document text
    • http://dadosib.22web.org/greek_mythology_reviewer.pdfIn PDF document text
    • http://nimolebefiv.22web.org/61226042667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422894/normal_60036b5f4da51.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/J4iha2C/4_pic_1_word_4_letters_bulb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zekarevuwo.epizy.com/xarozov.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/vermintide_2_breakpoints_guide.pdfIn PDF document text
    • http://xojapenekoxij.rf.gd/foxozo.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/minecraft_crazy_craft_mods.pdfIn PDF document text
    • http://vorawaforase.epizy.com/dedatabijebutojake.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/40442264935.pdfIn PDF document text
    • http://gikosetopetidun.rf.gd/new_dubbed_movie_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/53007826958.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 5244 bytes
SHA-256: 25d92c6317cb2afbf900b033c7c1c446a9c9c0712fb351524c708ff1afdaca2b
font_01_sfnt_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 10968 bytes
SHA-256: 41bfa34e42db52b781de0443032742b698e63c88612be302d692c27146f12c10
font_02_sfnt_off00011808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11808 16068 bytes
SHA-256: e7273338525a866f49bd556f13a0e46ce1e8513f85f175d9d987aa1f8b89adb9
font_03_sfnt_off00012cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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