Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca419e26b8306fb5…

MALICIOUS

PDF

56.5 KB Created: 2020-11-05 16:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3076ee6979446650a3f1091cdc4d598a SHA-1: 2314c82c40877c8f7cbba7ce5f4d2f824964f950 SHA-256: ca419e26b8306fb5b598c06e68cb514a9e6f08e217242de1d305aab233f1816e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL pointing to a known malicious redirector. The document body, though obfuscated, contains references to these URLs, suggesting an intent to direct users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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=words+that+start+with+double+r+in+spanish In PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/8196534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5f8d807df2303.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/debulevepujale.pdfIn PDF document text
    • https://fabuxitewuf.weebly.com/uploads/1/3/4/3/134349615/wimapexuxipaze.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/felasorarabipis/67891512497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eae50649-e926-469f-ba78-170df9aca6e0/wukivewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de976910-bb58-4e1a-bd55-31c0615a833d/avrupa_yakasi_86_bolumizletv.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/roxexit.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/2005_audi_a4_cabriolet_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/hacked_bloons_tower_defense_5_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/how_to_read_assured_drug_test.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9215 5292 bytes
SHA-256: 0c7d19777df608b69d903c6f5ec3738ade86ad186731da0ecf82aa99c9246621
font_01_sfnt_off0000a414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA414 2508 bytes
SHA-256: f93ef340cf80cf2bee737b12b191ff59bec1f65b22542b17ada48680fd139a6b
font_02_sfnt_off0000af0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0F 11400 bytes
SHA-256: d05dc6aaa53dfda0d1ffa122feb8073ef14a2412951325f825e5fba8ee2bc4e4

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