Malicious PDF — malware analysis report

Static analysis result for SHA-256 177eb2a65ab7d5b6…

MALICIOUS

PDF

59.6 KB Created: 2020-10-25 19:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4670baa387192920c6e230a7c4b6bae9 SHA-1: e504b1a366eacaffcf17d73ba0253ff1b33bbc19 SHA-256: 177eb2a65ab7d5b6cdb5903c39b65d6e39fe9cd5d5acca92954c49f276e6549f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting an attempt to manipulate search results or distribute content through a link farm. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=all+7th+chords+guitar+pdf In PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/gufiz-bimugil.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/togiluxafik-kipesegeluwedas-juwisoxoweruzi.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/169c4c32b41b0.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/0e624e6b88c3d.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/lexinolobir_fusimudowod_mizuvopamerax_ruwilixarew.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/gufapek.pdfIn PDF document text
    • https://karozazosepi.weebly.com/uploads/1/3/4/3/134316788/revorojazugebaj.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/1/0479/0216/3110/files/sepewimowol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8091/8203/files/dozug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2754/5755/files/wuzobogapilazofas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2779/1009/files/properties_of_rectangles_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7622/2118/files/98854606020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/79481343658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7564/9187/files/jakigoro.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/beginner_s_guide_to_digital_painting_in_photoshop_characters_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/44038601388.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/gidavixerebiru.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/chander_pahar_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/luxawuxodus.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/78252011527.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/primer_of_public_relations_research_3rd_edition.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F89 5484 bytes
SHA-256: 68d1268c0788a5d19c604b5b5c1d2d3f56a20c6aa29377f876fb0cde67d5a28c
font_01_sfnt_off0000a234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA234 12032 bytes
SHA-256: 400faf3c6300ff3a30baffc27cf3b4328cf7040fb941fdc6793a45cf5345511a
font_02_sfnt_off0000cb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB78 16120 bytes
SHA-256: fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd

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