Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbaded62cb4cba1a…

MALICIOUS

PDF

73.8 KB Created: 2021-01-11 07:36:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4074bc3067b6e830191c11a5a138dfbc SHA-1: 3f30d7e586614de8cb5b268fa08abb771dc786d1 SHA-256: cbaded62cb4cba1a9576c863c1f7a75cb1729f272d9e6f146c98e9bd935a753b
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=audio+sound+recorder In PDF document text
    • https://cdn.sqhk.co/fovuxugo/7jdihnW/latest_flower_nail_art_designs_gallery_2019.pdfIn PDF document text
    • https://site-1172371.mozfiles.com/files/1172371/73497122790.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/IjhigjB/gmail_sign_out_of_single_account.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/ggJwEhe/20771089784.pdfIn PDF document text
    • https://faboduvo.weebly.com/uploads/1/3/5/3/135343103/6613889.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://s3.amazonaws.com/wizidimawag/4732341013.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/bibliotekarstvo_i_informatika.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/lawulojakajiforudare.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/34703623988.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/66642907495.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/69864896757.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/dakokuginirofexilaxa.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD830 4484 bytes
SHA-256: dd469392315785b0eb185fd57e8dbaa9d0865b240b564a6a72d59531299c21a9
font_01_sfnt_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 10936 bytes
SHA-256: 8237c5246dafd04b2fd346567cfb954bae73ba103abb8d8a04c54b26c8d03b35
font_02_sfnt_off00010ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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