Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f08e293d8c4599d…

MALICIOUS

PDF

77.3 KB Created: 2021-05-19 20:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 99d2d9238ce67c7809f280cb9a5a12f1 SHA-1: b0f7273baec5eb432627a0b212236574f07b0541 SHA-256: 6f08e293d8c4599d0decabd62d1d3ef8307394443d03b8d823e889f602873e5d
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 0.9998

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 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://lozipotod.ru/strik?utm_term=can+u+get+the+cw+app+on+ps4 PDF link annotation
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/6cdac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_606a6d3a5e19e.pdfIn PDF document text
    • https://dajedenutiwifux.weebly.com/uploads/1/3/4/3/134318988/1914123.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495392/normal_5fed5a1c9f22f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484995/normal_60148f4d131c6.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/betefowubevat/xajawaworebovovowusaxaga.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/mepatasunazaradofuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30edcc1e-2af7-4569-b636-f8553ae3180d/why_is_excel_good_for_data_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f25fac-0baf-4f75-9b59-210907e1ab67/rolasesakalerofikasitiju.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/orange_pear_apple_bear_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/kerovumaxomikitore.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/why_is_my_cuisinart_coffee_maker_leaking_water.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/chinese_to_english_conversion.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/kareena_kapoor_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a0b024-99b0-49fb-807e-6ea5e14cbb89/how_to_replace_briggs_and_stratton_ignition_coil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4818670-5df4-42ee-b187-7fef8afa50bd/why_isnt_my_printer_printing_straight.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/totofivarusiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/visual_c_2010_32_bit.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_off0000f159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF159 5152 bytes
SHA-256: af5b0abd2a4cad197787c4253fd3be8c4e3855aac8cbc2a735a764fedbb5576f
font_01_sfnt_off000102fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FE 10928 bytes
SHA-256: 7266a7533a8f9dcd88909bc97f93daf135c5f18f3f89e26744d59610919228fb

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