Malicious PDF — malware analysis report

Static analysis result for SHA-256 9587ed11a87b09c2…

MALICIOUS

PDF

105.4 KB Created: 2021-03-29 21:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d955df6c8956d211ea88398b94490416 SHA-1: 59d47663787b49df4f441acba1112cf7a5a305a5 SHA-256: 9587ed11a87b09c22cbbed79064466a2c100a95e4cac8046ad5962bff631099c
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/wix?keyword=doctor+david+williams+hydrogen+peroxide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424009/normal_5fda1e816e792.pdfIn PDF document text
    • https://bulabameworiw.weebly.com/uploads/1/3/4/0/134096114/mamajemogekopugo.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/djinbeE/sports_scores_last_night.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/i3tBhfA/surah_al_shams_written_arabic.pdfIn PDF document text
    • http://1xbets-reg.site/782405807824vxvu.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/2203169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_60458f67890f1.pdfIn PDF document text
    • http://netzamka.ru/ghost_rider_3d_hack_apkclkz1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465701/normal_5ffc1084e29ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5fe8252cacdb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404113/normal_5fe43030a3b81.pdfIn PDF document text
    • https://cdn.sqhk.co/wejafivelij/RoafgeU/logasadilasaxan.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/jivuxo/4312986476.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/install_chrome_extensions_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/que_significa_soar_q_se_caen_los_dientes_de_arriba.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/bodyguard_movie_ringtone_tau_tau.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/physical_science_textbook_grade_11.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/woniwaritajujedibodor.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/59682657289.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/xexifikerorewejuson.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_off00015bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD1 5808 bytes
SHA-256: dc3a1f963c4519be77ba279c6c584f4b5e3d220e2fe3452fe7f4af998bf7b60f
font_01_sfnt_off00016f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F94 11768 bytes
SHA-256: e379dddd6dda9dc60d894a8036a573fcd28878e8c89716546765694fe1d58c9a

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