Malicious PDF — malware analysis report

Static analysis result for SHA-256 95733ebbfacdb53e…

MALICIOUS

PDF

68.5 KB Created: 2020-12-02 23:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7f305323bd9dd7ac183f378c24e94441 SHA-1: 4d0cbdbb519693a2c38f2cbb181a31f01892679c SHA-256: 95733ebbfacdb53ec915dfd047886689a7c3cf7fc2b3c430b301ac16d215c35b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm and a redirector link pointing to what appears to be a lure for downloading a chipset driver. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded links suggest a social engineering attack.

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://gettraff.ru/aws?utm_term=amd+am4+chipset+driver In PDF document text
    • https://zelikozuka.weebly.com/uploads/1/3/4/5/134594864/972340260a.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/botolaj-wilepegavifef-zebud-sebapuwibin.pdfIn PDF document text
    • https://turetufifej.weebly.com/uploads/1/3/4/5/134500159/49c56f6.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/3707.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/safenalavojuwu/orchestration_platform_means.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b3a916f6d44b07c461c5/t/5fc780e3e2dcb1274df18803/1606910180486/politics_and_the_english_language.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e607df132613bbbdbdb8/t/5fc33abbe6d49a06bbfb5ac4/1606630076503/73549956849.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/genki_1_workbook_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845736c5-1158-4aa0-aff1-309764b49d73/6293466315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a2a3fa-7973-4a1c-a2f4-aabb859b1ac4/8958643420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49070d97-cc86-4ddd-ae3c-e214fae11358/47626620452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04f164e8-7b28-45c2-83b6-38e8f7f79eeb/generos_literarios_tipos.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_off0000c1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A7 3220 bytes
SHA-256: 649094d68bdc4c6112f61d667d80653cf7145f6bdd17bc0dd4fd903a4133c32c
font_01_sfnt_off0000cd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1C 5420 bytes
SHA-256: f3ff6b5d7185e4c15e50efcb4dc08d87384559806062ec6ccac5364f0d4979a7
font_02_sfnt_off0000df6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6C 10960 bytes
SHA-256: efa612f74e0d22a9f3c48d15ea4d979d5b3efc8da8274fa73fa1396c3fa7207b

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