Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2cd300c93f3882…

MALICIOUS

PDF

66.0 KB Created: 2020-11-28 03:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b3df06fb8dcb9d2fed2c0d61c64b1c50 SHA-1: 1bc5b3fa266364f57f76f588412a7bdf28b3d526 SHA-256: 9d2cd300c93f38821a3231a7cd95d2658f79a964a20ac0f56574132f0421afb7
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a redirector to known malicious infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to create a link farm for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=chale+aana+whatsapp+status+video++wapmight In PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_5fa6c6e1be442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_5f89206b06a05.pdfIn PDF document text
    • https://kinumonitebira.weebly.com/uploads/1/3/4/6/134605003/065c6d36da45be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f8f6f8f4cec1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384647/normal_5f91fd02ece20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b987d73c-dced-47f7-95c8-f81d493ab60b/pekirekeliruberokiso.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/58443348268.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/tabijuxifuzijapi.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/cello_tuning_app.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/animal_habitat_worksheets_first_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/sefilakimesuguza.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/50021249184.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_off0000aa6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA6E 5332 bytes
SHA-256: 30ccc8bf5855371a13dd6925a96d09afc3757b35b712641a760beb4cbbc3e3c2
font_01_sfnt_off0000bc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7D 2044 bytes
SHA-256: 7819ef1de3348ad227e302ba7a5900f372fd4440a21f482bbf68fb1bc67eb97d
font_02_sfnt_off0000c5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E9 9320 bytes
SHA-256: 21a183b1d98af0463476b73cd27bb41e228882d937fb778e8f3d4636835607a5
font_03_sfnt_off0000e5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E7 16060 bytes
SHA-256: df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210

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