Malicious PDF — malware analysis report

Static analysis result for SHA-256 1209a7208579b83d…

MALICIOUS

PDF

69.9 KB Created: 2020-12-16 22:12:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f6bd7cf29ab3d3a37de25c01da44c411 SHA-1: 763ba21b15204cc918e8228421d648de1ec1784a SHA-256: 1209a7208579b83dde2dd549f3451df535170f7b32b9224a2ea73428d435e8c8
214 Risk Score

Malware Insights

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

The PDF contains multiple heuristic firings indicating malicious redirector links and a link farm. The embedded links, such as 'https://ggtraff.ru/123?utm_term=36cm+to+in', are likely used to funnel victims to phishing sites or download further malware. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://ggtraff.ru/123?utm_term=36cm+to+in In PDF document text
    • https://ziwuwozapa.weebly.com/uploads/1/3/4/5/134517717/jegusikuvaso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_5fa6f9de3a906.pdfIn PDF document text
    • https://padazuvotoj.weebly.com/uploads/1/3/4/6/134687326/zanipul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5f8ab6ab1cb81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc17a540b6b03258f39a641/t/5fcfcf1d053015467a411ee3/1607454496872/dance_classes_for_adults_beginners_leeds.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/vocabulary_word_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fa26e2fce462bc8c54f9/t/5fc5471961e25426e1e55549/1606764314361/lizig.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/lifetime_fitness_johns_creek_spa.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/bimabixiwobidatiloz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27a90c14dfd36fefb8bc0/t/5fc9ffd8887b444c615af814/1607073752828/95407712180.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6757de5c7695ca9c1adce/t/5fd62b7d0f11661d4c24b83c/1607871358431/71443918072.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6941c1452f90b7f0c5d7b/t/5fcbe985a3bc3d19153d0df0/1607199110103/app_assistant_huawei_emui_10.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_off0000c136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC136 4652 bytes
SHA-256: 7647967758637692f65954869aeff609a0480a9113eca021ce2498b2e86ff12b
font_01_sfnt_off0000d0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FD 10604 bytes
SHA-256: 61d295731415876b1cbf7dbb83ae6bfb55c9d9d4db4974527b734bd154894892
font_02_sfnt_off0000f55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55A 16284 bytes
SHA-256: e958ea77bbefdab7dcf92705078345218821b6632d2ed03d9a8c7ae93fd6e367

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