Malicious PDF — malware analysis report

Static analysis result for SHA-256 5091b69d5847c7c4…

MALICIOUS

PDF

69.6 KB Created: 2021-04-07 18:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 15c8e4f79930745903f8afcc1f45b116 SHA-1: 86eef7803a4c303f3e0d8726c7217b48a6f1769c SHA-256: 5091b69d5847c7c4242191ab0fd6948a91f99989b8fd315fcff55b2803190c28
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/wix?keyword=chapter+12+giving+test+answers PDF link annotation
    • https://cdn.sqhk.co/vivutazawi/sjahbie/rujapatelozirofarebunos.pdfIn PDF document text
    • https://cdn.sqhk.co/wupefukawis/63Nhejb/bilanzbuchhalter_ihk_prfungsaufgaben.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/if4jgAM/42652900645.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365607/normal_5ff4024dd7521.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476595/normal_5fe118e6525c4.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/iezjbif/welaf.pdfIn PDF document text
    • https://cdn.sqhk.co/rawuredilu/igiekjc/debit_note_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/idggZgf/dovaxetumitebawufaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452385/normal_5fe20acd92478.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/jekwngh/retafuvaduwoka.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/wutisigila/pufepewodomomapixemoto.pdfIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_c178921f72c44f2ea11c6dff2d035e5f.pdf?index=trueIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_c81703380a104c02995fd7db9144a367.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c65dd3-3c61-465a-9852-593a11d87b87/24247758211.pdfIn PDF document text
    • https://a9d1d3ec-13fa-4b7e-abe1-abe2c2ba1301.filesusr.com/ugd/f83029_746f4d619ccf4b39a71db49a97003cf5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/03aca56c-17fb-44af-a5ee-e57c0b092a10/the_rime_of_the_ancient_mariner_plot_line_finder.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/matopagefewet.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_98d25007f09b4112b93b4dfdbc944e4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xidazeze/tavumirapiju.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/fogugodig.pdfIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_996643f9ee9a40c0b1e6a1ab48272115.pdf?index=trueIn 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 7

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_off0000d33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33C 5288 bytes
SHA-256: 331d18d7e63c677733d5f53d6c396f74add34b41200df63bcb521db63528a71b
font_01_sfnt_off0000e54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54E 10568 bytes
SHA-256: ca0cb4665e1029f33f1ad5e7ecdbfb540f58e4b9e2edeff05508fbb3da1d43e0

Open this report in the interactive analyzer, or submit your own file for analysis.