Malicious PDF — malware analysis report

Static analysis result for SHA-256 41dd8593d7a546a1…

MALICIOUS

PDF

68.3 KB Created: 2021-01-13 03:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: debadf9848c3432d06eb1dbdc61910ed SHA-1: 84740802bb71c12ca41bf30fa8d2bde57a4967fb SHA-256: 41dd8593d7a546a13032ffc6711a999466742750534709d22a778f91f47c26c7
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9997

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 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://gettraff.ru/aws?utm_term=chhello+divas+movie+full+hd In PDF document text
    • https://static.s123-cdn-static.com/uploads/4475863/normal_5ff60b3bde69c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473340/normal_5ffa7b891bdef.pdfIn PDF document text
    • https://site-1240031.mozfiles.com/files/1240031/wood_wallpaper_for_iphone.pdfIn PDF document text
    • https://site-1168096.mozfiles.com/files/1168096/city_blocks_are_there_in_a_mile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_5faabd39acd92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_5f916504b428d.pdfIn PDF document text
    • https://site-1173152.mozfiles.com/files/1173152/34771092178.pdfIn PDF document text
    • https://site-1168429.mozfiles.com/files/1168429/vakabibazi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_5fbf3be7b38ef.pdfIn PDF document text
    • https://site-1174278.mozfiles.com/files/1174278/scorpion_mk11_wallpaper_cave.pdfIn PDF document text
    • https://site-1202186.mozfiles.com/files/1202186/hidden_object_games_free_download_for_mobile_phone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487413/normal_5fddc0a8eb4aa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000bc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC53 5016 bytes
SHA-256: dd24fe3bd1330bcad0d3a6736157b55999984a2c2d51fe23996b573da7e5ad89
font_01_sfnt_off0000cd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3E 9796 bytes
SHA-256: 879f1badb93b3b14e183120d14a0efbbf38221db564bbc301e9b9770a11a8bef
font_02_sfnt_off0000ef06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF06 16344 bytes
SHA-256: 3745d395dffe053ce12bb6e6d543a89fda750690c61e1e786fb35984b58e44e5

Open this report in the interactive analyzer, or submit your own file for analysis.