Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1180c1333b3eaf…

MALICIOUS

PDF

79.2 KB Created: 2021-01-13 13:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: bcd67f1ceec5bf8bb166048e9578d45c SHA-1: 2b817058f4b1220792ea9da1b44284db39a4d09f SHA-256: dd1180c1333b3eaf6b326dc70de2db31a89650f13e89b6bf962113972a9d7a73
244 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to disposable hosting or redirector infrastructure. The primary malicious URL identified, 'https://cctraff.ru/aws?utm_term=watch+android+13+movie', suggests a lure related to watching a movie, likely a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=watch+android+13+movie In PDF document text
    • https://site-1243885.mozfiles.com/files/1243885/crystal_report_viewer_13__0__20.pdfIn PDF document text
    • https://site-1175521.mozfiles.com/files/1175521/air_force_special_warfare_recruiter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452837/normal_5fc0231ddc4c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5fa1a7d9d4ab0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420019/normal_5fa419ca888ff.pdfIn PDF document text
    • https://nadaxobolimige.weebly.com/uploads/1/3/4/3/134365666/438779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402711/normal_5fa8ca9e08341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_5fb7eef88859d.pdfIn PDF document text
    • https://site-1168191.mozfiles.com/files/1168191/joxikidunasapurixibuk.pdfIn PDF document text
    • https://site-1171498.mozfiles.com/files/1171498/gusojibudumasawosuluxetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450513/normal_5fe98e98b797c.pdfIn PDF document text
    • https://site-1175676.mozfiles.com/files/1175676/7729115254.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/nhjXxhi/word_cross_reference_text_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fa38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA38 5256 bytes
SHA-256: 1fc1a8ed9991a230b18bc0256d95d4f3788be416ab9339f14d6c64e659968806
font_01_sfnt_off00010c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C05 10636 bytes
SHA-256: 1733e62d19e6d0642a281cdeac88eadad893b6cae2905e8f5986c0dd8e128fcf

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