Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ba41039ca3d4b3…

MALICIOUS

PDF

77.2 KB Created: 2021-04-04 10:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 278bf8596e0519d5c893609704125f3d SHA-1: 1eb48f5e0561cba57f2b9a3b83acfd2d248bd22e SHA-256: 01ba41039ca3d4b37599c84fa1c9d524c6020d29cdc3233139eb6805667a0958
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 0.9993

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://pelibifir.ru/award?keyword=legend+trumpet+solo+pdf PDF link annotation
    • https://tekemuwuva.weebly.com/uploads/1/3/0/7/130775778/3460303.pdfIn PDF document text
    • http://zapapoberok.iblogger.org/isothermal_and_adiabatic_process.pdfIn PDF document text
    • https://bazofaxeretaw.weebly.com/uploads/1/3/4/8/134868688/wukimebabuxewo.pdfIn PDF document text
    • http://xigobaxubegozuv.22web.org/medical_microbiology_test_questions_and_answers.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/lulakon.pdfIn PDF document text
    • https://seruvukajobal.weebly.com/uploads/1/3/4/4/134479042/37809ac30baa1.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/3hhjajg/college_basketball_timeout_advance_ball.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/dIzichj/soul_hunters_pet_ginx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mefufoseza.rf.gd/vewazidiraxodasetivim.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/accident_report_book_amazon.pdfIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_34c747e749b14d7da70dbcd0cb8bb93d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/scrivere_forma_attiva_e_passiva.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_5801b28e0a24413faa17b732cf1bbec6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/2901847647.pdfIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_8e8d320bb0644bcdba524d39b26b8239.pdf?index=trueIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_78dedaf8f7114d65843b88361456c048.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c9e626-f02b-4303-b768-d610d3bea96b/vabakamilave.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/botifirubigujixewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc82ec3e-aa9f-4ea2-b744-248b943b4df6/how_to_understand_your_bible_to_norton_sterrett.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/359d4643-e1d6-4e59-8f6d-4afb9d673a08/wapilewokobod.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/35500163732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab72c15-416e-43d3-8e8e-11879443a18f/kubirinomivezokabem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6abd888-7ff2-4ea1-876d-ddc628bf8796/28974543883.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF017 5092 bytes
SHA-256: 0c07306c7758f87c4360b2769791282ae2db85ea299b07ae14db8094b19cc99d
font_01_sfnt_off00010160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10160 11640 bytes
SHA-256: bb253a3758738a4db0ac36ed1b70a8de811ff8354956141f5d1b7dd995bf917e

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