Malicious PDF — malware analysis report

Static analysis result for SHA-256 332914149d83bf44…

MALICIOUS

PDF

88.9 KB Created: 2020-11-11 00:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fe14fcc48234f2e53b64bb3b477096b1 SHA-1: d76b4c0b99b9a603c9157d2e3f2d72f7f1475747 SHA-256: 332914149d83bf44c0a8c15ce6b2cf61b0dcbef4c1b6100325b693da66f03966
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of numerous external links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/aws?keyword=2020-5000%253D-2980+is+true In PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/jakawapos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463533/normal_5fa9bfe1ea38a.pdfIn PDF document text
    • https://wupirevedog.weebly.com/uploads/1/3/4/7/134709422/bedinu-tubem-lajazopanen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472491/normal_5fa44cb06c474.pdfIn PDF document text
    • https://vewawuwidavejo.weebly.com/uploads/1/3/4/4/134403009/b862c0bdeabc.pdfIn PDF document text
    • https://kofemadaki.weebly.com/uploads/1/3/4/6/134675418/fogelogefafebizaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f871bef817d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451231/normal_5fa60cd5af445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f8a89786b076.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/d1770b21-1ae2-4708-a9f0-0a0ad43a569b/nox_app_download_in_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/secretary_of_state_florida_dmv.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/the_right_questions_debbie_ford.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_off0000faeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEB 1872 bytes
SHA-256: 223568fc15723d408f00056d2cf6bf73ec0b5e81a44ab038b8d55cfaeb1c3c3d
font_01_sfnt_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 5168 bytes
SHA-256: 8ea7b019b09a828bf3675101e4a4038c5251da9d0d3441c276113fc677d876ba
font_02_sfnt_off00011589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11589 13416 bytes
SHA-256: 978d63e57c2a40cddfa09808afaf5bd8d8618ac67a5d86d0eccb2c1eefc7657d
font_03_sfnt_off0001400b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400B 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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