Malicious PDF — malware analysis report

Static analysis result for SHA-256 106b6439734a4b3b…

MALICIOUS

PDF

75.7 KB Created: 2021-03-28 06:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0876e404f61dfd22c5bb341f875e6e3f SHA-1: 50cb13f8fd01bb4a3b730c5f0c30eade9ec189ba SHA-256: 106b6439734a4b3be35a1e22b8659d6e872232aafe6ed0ba7378d08e187d353e
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 0.9991

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=powerline+av500+netgear+istruzioni PDF link annotation
    • http://sportplays.ru/xuxujabapavam9qpi3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490364/normal_5ffcfda9a3f0d.pdfIn PDF document text
    • http://trokot-roznica.xyz/26560367633cx7oz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_6048efba41259.pdfIn PDF document text
    • http://mimamiva.iblogger.org/vawilunasasadisinasuwona.pdfIn PDF document text
    • http://menformula.xyz/100229490569abkn.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/cubs_2020_schedule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404285/normal_5fcd81c1e829b.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/how_to_write_a_statement_of_faith_example_baptist.pdfIn PDF document text
    • http://useplafond.xyz/mevuxezoninar5j4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406789/normal_5ffec083c54df.pdfIn PDF document text
    • http://zamuxodub.22web.org/meaning_of_business_risk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_1e45cf7f4a034c6194276b1601df3b17.pdf?index=trueIn PDF document text
    • http://liroporuki.myartsonline.com/pididivepiwin.pdfIn PDF document text
    • http://tetizawoto.rf.gd/81245916902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9359c82e-54c6-4989-85f1-008b708276f5/87492144560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b578b4c7-3ea4-40ff-825c-b8f42b2daee7/pl_660_hidden_features.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c866c5-878d-4b27-843e-bbebee1edd3b/xitemoferukap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b7ff68-fe74-466d-a799-4e22c55541ed/holt_handbook_fifth_course_chapter_3_answer_key.pdfIn PDF document text
    • https://74df6fe0-557b-4e47-8461-f2df536053d0.filesusr.com/ugd/4dcf4e_7965823eb5414d4e8a769ac0e057a4e0.pdf?index=trueIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_2f1031571b4044f29bc355213c50ce31.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b05f3d-af83-4401-a61c-2b66d6ee280d/how_to_get_into_digital_photography.pdfIn PDF document text
    • http://zixedofa.epizy.com/tet_2020_answer_key_download.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_1ffa69136d6943599d9f2bd53325603c.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_off0000e83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83B 5324 bytes
SHA-256: 26d7a11c6cd68c84bba774df9af71096fa94908ddaa6fdec252e2ce055e1f680
font_01_sfnt_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 10916 bytes
SHA-256: c74cc3be4b5864504e7323324e4074e22ca985cd9f27d364fd8c35dec254bcab

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