Malicious PDF — malware analysis report

Static analysis result for SHA-256 979c5c1f64bcc037…

MALICIOUS

PDF

105.0 KB Created: 2020-11-30 12:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3fa82aebba37fd9ac4100345938f0f7e SHA-1: 206b31080de4a4281bc6603f9801c4f61aaf34da SHA-256: 979c5c1f64bcc037ac1c4b84e753fac21efae87811bb48909de0cb3b799d8914
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=restaurants+bourges+guide+michelin In PDF document text
    • https://wozagadukuwa.weebly.com/uploads/1/3/4/4/134483903/86d6a37630dd41f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_5fb2d56f58b9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454289/normal_5fa0e6e6c3daf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5fc19edd71699.pdfIn PDF document text
    • https://xazotanosiwe.weebly.com/uploads/1/3/4/3/134314219/651001.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/5fc0f05df9866f3fd2d48fd4/t/5fc166cde6d49a06bbc715f3/1606510285933/which_graph_represents_a_quadratic_function.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf549b9d793648408502fe/1606374555776/88569154281.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf63b81972c46e3c96aeb7/1606378428330/jaxivivuwegunab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe49f15147b14804000d3c/1606306290366/31334767144.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a00dd49dd124473946a2/t/5fc45fbf1972c46e3c297493/1606705088119/ang_probinsyano_october_3_2017.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf50d9a97599144eedf868/1606373594648/zufud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd12daeedf074882611d09/1606226651014/hughes_middle_school_dress_code.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d0065e8e827d428d60b5/t/5fc0e98b173fb5383bc31c9d/1606478222438/kaxupazalasadarimufek.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C3 14168 bytes
SHA-256: 269382361e18553b5d0010c6776d78f018b8802807df2844a4c598d2c78b6b6e
font_01_sfnt_off00014543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14543 5500 bytes
SHA-256: 812188c4642734cfc854c58d739f8d8f874bd1b7494cee26faa1ef5f6073451f
font_02_sfnt_off000157cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157CB 13152 bytes
SHA-256: 3447d350c39a08ed452cf4789cfac155537622b773c5520ffd5c924d9396868b
font_03_sfnt_off000181a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181A0 16060 bytes
SHA-256: 1018660efa6a1a00280f0dbd6ee9814149b2344b9acf14d98de2cb76d1e712aa

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