Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd1ecf3f85afe74…

MALICIOUS

PDF

79.3 KB Created: 2020-12-11 13:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9cf9b3d16893ef82d490de22aec382c1 SHA-1: 39ae3724674ce7acc4b96a45d1948265f9dd1bfb SHA-256: cbd1ecf3f85afe749f5e983605b62c7d49fca65f6674646718703922fbfefc11
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirectors. The primary URL, 'https://cctraff.ru/aws?utm_term=thimiru+pudichavan+tamilrockers+2018+movies', suggests a lure related to pirated movie content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/aws?utm_term=thimiru+pudichavan+tamilrockers+2018+movies In PDF document text
    • https://nukofagola.weebly.com/uploads/1/3/4/8/134883999/4534575.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/pawukitamifibifu.pdfIn PDF document text
    • https://zixulelivu.weebly.com/uploads/1/3/4/5/134507035/1294310.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/marulil-petudir.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/wanij.pdfIn PDF document text
    • https://gebapawuvafiv.weebly.com/uploads/1/3/4/5/134519736/jepin-kisasamowexivod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5f8d04a1b53ed.pdfIn PDF document text
    • https://midoninojun.weebly.com/uploads/1/3/4/6/134665084/kixevujesefa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/gogunabones/is_pfa_please_find_attached.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c50e1c8c741314534cd3/t/5fce74cbfbb6240de8f845be/1607365836406/lomedadogirubige.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/i_love_to_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/birthday_background_hd_wallpaper.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE3 5904 bytes
SHA-256: 487a67a34f05ee9e903cd378ee8dffd24b0f6c2bfae557eaf7e80a480decea1e
font_01_sfnt_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 9428 bytes
SHA-256: 773fa702f62f26a8557d27ce0316dac052e7c3d1d3ebbfca48248d4d0648083d
font_02_sfnt_off0000f75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 6416 bytes
SHA-256: 6b2fd1f217a3a27d6acb2185f0ee10a857b16fed3f9b34a826001a117bc49cd3
font_03_sfnt_off00010bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF0 10384 bytes
SHA-256: 4aeac2c9387d10880fa4d8bfaa33442a92b757175c0eebe609cdd153b997f9d6

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