Malicious PDF — malware analysis report

Static analysis result for SHA-256 55bd44c9106a5279…

MALICIOUS

PDF

70.9 KB Created: 2020-12-17 20:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 49fd5022a998d127a6c5c2ed9ee65a83 SHA-1: 787b4bd5d49a7f7f150495c68e013842922a50fb SHA-256: 55bd44c9106a5279025fbcc644e1d86f274cf052dd333b63d8783731511c3b6d
214 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier and ClamAV detection further support its malicious nature. The primary goal appears to be directing users to potentially harmful websites, likely for phishing or to download further malicious content.

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://traffking.ru/123?utm_term=tour+guide+script+essay In PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/e66ab4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc5c9703dfdd95b60f6a0d0/t/5fd131b013e9b979cf1ae739/1607545266338/54575365763.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d8d416f6d44b07d7d45f/t/5fd6d7ec0f11661d4c3dc1d1/1607915503241/analisis_y_diseo_de_sistemas_informaticos_ppt.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a6a1be9b6939512b3ad5/t/5fcc46f2e43f2b00a89c527c/1607223028165/hideki_tojo_quotes_in_japanese.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e85027a199023ab5619d/t/5fccd0c0eb18547f4b82dd20/1607258305293/semodafumutebazizariropus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e986de2a-9326-4c7e-ac39-78b294ec0c8e/factual_report_teks_animal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc527cf084698658e79f80f/t/5fc6acce61e25426e1242c61/1606855886389/berumexevux.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc114532bbd74065807882e/t/5fcbfcd8d235d37878b06ddb/1607204058677/magic_fluids_pro_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26545fe-c7b8-4493-9f26-281126fffb7d/nexagifigamu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54ea3b8467722f1f10cc0/t/5fd04b3526d54b3c06ce59eb/1607486262260/cara_download_virtual_families_lite_mod_apk.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_off0000ccf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF3 5036 bytes
SHA-256: 2e01a6bb63b133b5ee2f892c8cdd993845d8c63b421a27392478e95d8209fa85
font_01_sfnt_off0000de38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE38 10140 bytes
SHA-256: 57cd8daead399458710d67e2745412fd3619b912df733e319286d3bd7012f2b3
font_02_sfnt_off00010108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10108 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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