Malicious PDF — malware analysis report

Static analysis result for SHA-256 c733e7841d705a62…

MALICIOUS

PDF

75.2 KB Created: 2021-02-23 08:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0ddc430a200fcdafc3104c794b3d7faf SHA-1: e559c4963fe1852936d38b720bc3db2975a5acce SHA-256: c733e7841d705a62b70020229ec6df7caff43af6efc628b7cbfb3de59cca1a7d
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'html and css books for beginners' and embeds a URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate maliciousness, likely a phishing attempt or a downloader. No scripts were extracted, but the embedded URL is a primary indicator of compromise.

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://seumenha.ru/strik?utm_term=html+and+css+books+for+beginners PDF link annotation
    • https://cdn.sqhk.co/vuzowadijavu/gcjdhhn/legends_of_runeterra_budget_decks_codes.pdfIn PDF document text
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/fojen-jaderifu-mikikojavorok.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/Vihl3Bn/hobby_lobby_in_hartford_ct.pdfIn PDF document text
    • https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/tuburawojono.pdfIn PDF document text
    • https://cdn.sqhk.co/malasexek/himifO6/70813766367.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/ieHXiFj/55151811943.pdfIn PDF document text
    • http://zatuzosej.iblogger.org/conflict_minerals_reporting_template_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/whdgOhh/mashup_songs_online_free_without_download.pdfIn PDF document text
    • https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/vipaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/11525030804.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/fiction_or_nonfiction_worksheet_first_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/animatronic_hand.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/brick_game_classic_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/pugosuwapubovokik.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/80833991043.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_off0000c8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B7 5504 bytes
SHA-256: b4e94efd516fd75d00e1fdbbe4eca9c81ea267ee23f46598b4af217fdbdb50f2
font_01_sfnt_off0000db51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB51 2512 bytes
SHA-256: 4dce65651168509d23c29733f7150cf533a8e6ef747e4a2aebe96b50709536f0
font_02_sfnt_off0000e63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63B 10280 bytes
SHA-256: b1cb8fe3d737db1af72f221898ce40e9f63f842cca2b700ee4014a9a999d60ec
font_03_sfnt_off000109a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A7 16392 bytes
SHA-256: e66abfbeddc1d19d92dcb25e98d0a5acfcfed5afa902c0cdbe1883ebc60d8997

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