Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb086c71f896c4ee…

MALICIOUS

PDF

77.7 KB Created: 2021-04-06 08:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d0c89290445109d0493fe4aad753cf8f SHA-1: 538b345a7d79bf86f361ac601f15ddcc95640414 SHA-256: bb086c71f896c4eebc3ad8f45f8ab53ae8b79ce4d9cff723a30545578a456c80
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/aws?utm_term=boy+scout+handbook+2020 PDF link annotation
    • https://nimugafibe.weebly.com/uploads/1/3/6/0/136084612/960289.pdfIn PDF document text
    • https://bawoxuvebi.weebly.com/uploads/1/3/4/8/134886771/2636386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461780/normal_5fda16eb42ea8.pdfIn PDF document text
    • https://gidunixodon.weebly.com/uploads/1/3/5/3/135322071/xozuna_gufozidet_xumeme_pufesi.pdfIn PDF document text
    • https://texerazijibegu.weebly.com/uploads/1/3/5/3/135302316/51a8a34838c34c.pdfIn PDF document text
    • https://napokepuwaju.weebly.com/uploads/1/3/1/1/131164128/d6235e45d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451752/normal_60335cbf53e75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368747/normal_5ffc9948655f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_f80934a4838e40bc9f03c7a8287d9838.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/bejojixofuraw.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_fc491c1435e34bbdab88b3c349b61d38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sisaxu/medidas_de_seguridad_covid_19_hosteleria.pdfIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_14b36a3ca51843c0a4e7301559ea7c6d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/divinity_original_sin_2_arx_level_guide.pdfIn PDF document text
    • https://1a899ca6-11bf-4464-971e-4bf0b885e765.filesusr.com/ugd/4ac3ff_ba13e2ecd14c4d949e3f283a47add119.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guxosa/best_cv_template_2019_free.pdfIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_3f57532de7f74f4887ad9eb85a7780d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/77374438706.pdfIn PDF document text
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_43a979b2e3224ec89a34e2ae421bceab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woneketelak/dudema.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/89594159660.pdfIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_a72a929205484ff5b3f741b434119a63.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1A 5528 bytes
SHA-256: 0bc7ea5314ad2aef55f1a93a7df0d6bef77db7be4e0267cd60a54f0f6dd2e76f
font_01_sfnt_off000100ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EF 11580 bytes
SHA-256: 90392e1f30d9f9d30d2249b86c1604227078578efcb663ed548fbc4fde09c19b

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