Malicious PDF — malware analysis report

Static analysis result for SHA-256 3168542037f323f4…

MALICIOUS

PDF

78.0 KB Created: 2021-05-21 05:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6b66f4202a9d57a111ed1717cd0a412f SHA-1: 70d5c519a6a625cc89655fe03787a5dae52e7e41 SHA-256: 3168542037f323f446a4599260558e48dc91cf7ac00c2c081aad045fcdb3bd6b
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://botokaw.ru/strik?utm_term=alarma+de+lluvia+plus+5.1.5+apk PDF link annotation
    • https://defilapaxupote.weebly.com/uploads/1/3/5/3/135335242/lipugiwu.pdfIn PDF document text
    • https://ronaleju.weebly.com/uploads/1/3/1/4/131482819/704ffb01.pdfIn PDF document text
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/7683825.pdfIn PDF document text
    • https://gimipozadifan.weebly.com/uploads/1/3/1/3/131380487/kobusinob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76fd9d0-5d93-46d4-9a4e-bf3348911ced/zafono.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/boggle_board_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a101a07-5a45-4826-86a8-f8454ae0d246/sharp_el_1801v_manual_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f16b95-40b6-48bf-a5b1-f191b37588b5/what_is_causal_factors_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/kindergarten_worksheets_identifying_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/83268154680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b302032c-4ca8-4685-82d7-529164746873/fluval_fx5_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/lekosujotokaxolari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633396e9-576e-41ab-9726-3e429ff60395/51455043671.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/avengers_infinity_war_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/filmywap_2017_bollywood_movies_free_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8034b0-e5c5-4ae7-a69b-f95c21306acb/gigisarenajerolukivuxis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d846bba0-e938-489e-842b-67e2ded730e6/46316696224.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/data_flow_diagram_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4a1b20-603f-4749-9fe0-e87699f0a9a3/ver_pelicula_celos_asesinos_1996_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1072d3e-47e8-4b08-a9e4-f8e882e772e4/35125169041.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/89482389654.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/61940092730.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_off0000ef4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4B 5428 bytes
SHA-256: 9c5dc8ccd564c29f7a80e6c32cef484ed11350d63df367a8ddb22cd982a696e2
font_01_sfnt_off000101bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BB 12828 bytes
SHA-256: 5515b7a9f2b91ec48ce737afaf316dfab2310c6941abe14eb0e3f11489a86a09

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