Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f20d2e968967dd4…

MALICIOUS

PDF

61.1 KB Created: 2020-11-10 00:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cc3536ba0138fed92db155803f2ce241 SHA-1: d99bce5f7d5e9ad08d6488bbe15253d4c87731f3 SHA-256: 6f20d2e968967dd4c59658cd5d07f70c593d540151b279da7049a470fb983f71
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?keyword=valerie+lyrics+glee PDF link annotation
    • https://tedenugimug.weebly.com/uploads/1/3/4/3/134345185/wepevovi_fugidupukuzusut_navolewipo_fovoliduku.pdfIn PDF document text
    • https://gematisi.weebly.com/uploads/1/3/4/5/134599806/detutevej-lazuno.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/wutezigojuxi/list_of_transparent_minerals.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/adjective_phrases_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/19877732272.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/aap_beeti_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9a00e3-0d49-4e75-af2a-4360376f7da3/fijomusoboruwavusud.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/jevupiren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/646332e7-af05-4394-9616-e3361826a3f8/19557625562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e919d43-e05a-42cd-af24-95ce5e090b29/21768448637.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/misijedorika.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/bokidanorawoxifofelujuzi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD9 5032 bytes
SHA-256: 9f5e81b8ee5cb663d6296ff1f0ab68cdbe29809e7a2874bbd76ec25536fa2b07
font_01_sfnt_off0000c115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC115 12380 bytes
SHA-256: 4b402c0ebf0d971fbcfc17d1220cacaa011a6ada8eb77392e8a90ca1a7a00f2e