Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd57d2745dad1f6…

MALICIOUS

PDF

47.8 KB Created: 2020-10-30 10:32:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2e8881e9964532eb40af93d69ce55981 SHA-1: 5a409c51efc3d6c81c06677baef9b42832b44f18 SHA-256: fbd57d2745dad1f6710d9db21152d8cc2a4c37329be586f97881de3cc8d32feb
194 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 an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ggtraff.ru/strik?keyword=msp+password+cracker+2020 In PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/8256353.pdfIn PDF document text
    • https://tosisevutozu.weebly.com/uploads/1/3/4/3/134328017/lijit_mezivaxobaso_tukosumume_zizim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/27010670077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1857/2704/files/tedewabobuzadoxemopegamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db05d13e-720b-410e-974d-00a4ec799f24/87836368747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/124acfda-993c-4282-bfbf-99afac6426d7/vodujuwubobobalegemokup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7572/9056/files/mrs_gren_worksheet_ks2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7156/0616/files/six_sigma_yellow_belt_project_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2746/2809/files/dish_network_tv_guide_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136269de-98dd-4a21-9bfe-8622be3ef888/82068209872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e5a2c9d-dce7-4544-ade9-b2e188444834/77802684679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9456/5798/files/corn_columbian_exchange_prezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/0711/1851/files/susan_buffett_scholarship_unl.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_off00007a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7A 5472 bytes
SHA-256: 5080b77bfb959ea301f6c3baf174f7e127a50ffc936a3b562d0ee4e1537666c4
font_01_sfnt_off00008d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D45 10920 bytes
SHA-256: 983e001fabdddee9fa6607f6b19cd8cb9b5b7e85d92615a2c2d18f31d08eb465

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