Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bba52a00bc33151…

MALICIOUS

PDF

76.2 KB Created: 2020-12-04 19:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e0677105676a2d998ed102b687723faa SHA-1: d09abec18cb193d0666e3c855c390885adea592f SHA-256: 9bba52a00bc331515a5a51640333378a9c9d8464dc10f2db6b95a2287236fc7e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=tolkien+on+fairy+stories+sparknotes In PDF document text
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/6d8138be17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8e9b6412-5098-4aa7-b158-a5e744e0b985/movimiento_de_varias_particulas_dependientes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a6c1e7-6a36-47cb-89b1-c64ae2dadd0f/36973404320.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1321e2e34347c7045f8f9/t/5fc32729e18c5c478e62b265/1606625065795/20548905324.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/85454492760.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0e3b29c5e2669027f626/1606225468694/jusukeleserufevadijoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf49989ee0f32b8749c743/1606371738467/the_ninth_hour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90fb4bed-fa81-4ded-9db0-50988d1b1b4e/61373887312.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/mufidoxowufupetuxufebuvat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe32b2fa04221c71eb3b0f/1606300339768/zosijivub.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71D 2976 bytes
SHA-256: 96315f4005d3b97dd6949103e4905c85a2a4d42057c5b925cd2dc595bebd3768
font_01_sfnt_off0000d1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C2 4800 bytes
SHA-256: da4136e7e626f92660f7935ee20351e8f876702109771bde6c582d15af0e50b0
font_02_sfnt_off0000e217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE217 5832 bytes
SHA-256: e7784dc8bf9401593fea335737e7f278cef3e778afb133db25b9cea2a4dd61c1
font_03_sfnt_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 10648 bytes
SHA-256: 9239397540d79573d392e2e91210e3a17792ae90ede5760c1120a009f431a9d9
font_04_sfnt_off00011565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11565 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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