Malicious PDF — malware analysis report

Static analysis result for SHA-256 9555d6936b69c88c…

MALICIOUS

PDF

77.5 KB Created: 2021-05-18 14:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5346bd54ed51f2b8ebd4ad8161a9f214 SHA-1: 594e1a21b889061b14f64e4c96e16bc4dba0e5d8 SHA-256: 9555d6936b69c88c4aeb2ab1cfce12a4b364478c4448510259279eb7bb138654
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text that appears to be a lure related to a chess strategy, suggesting a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=defensa+siciliana+variante+najdorf+pdf PDF link annotation
    • http://genemot.22web.org/english_for_business_studies_cambridge_third_edition.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/tu_delft_campus_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dofomexikokubeb.epizy.com/28338896750.pdfIn PDF document text
    • http://najudugofuk.rf.gd/guliwitozezet.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/90207854590.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/23758376948.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/j_alphabet_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/11649149745.pdfIn PDF document text
    • http://jevejizodirosaw.epizy.com/39967749517.pdfIn PDF document text
    • http://zezewesiwakoruw.rf.gd/cancer_de_cervix_colombia.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/tascam_dp_008ex_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/isometric_paper_a4.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/baixar_jogos_para_android_via_utorrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f148f6a-f9b9-4f5b-95b7-88bc83c77b77/how_often_does_dividends_pay.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/android_emulator_x86_vs_arm.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/can_picking_a_lock_damage_it.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/35167728935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/106a4699-88ff-4b86-ab62-2878a4efc3d4/when_was_ipad_2_mini_released.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/lesakezewilenolip.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_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 5284 bytes
SHA-256: 32e4011778df9e7c17f3219b44c188d5b0043940417fab9ecf64ecf242a3488e
font_01_sfnt_off0001026b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026B 11232 bytes
SHA-256: 21bac7b41e58e8eb70e532dd75cc921b798b7505769c1357216f15f33053fef3

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