Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3fcc048ca9610b…

MALICIOUS

PDF

61.5 KB Created: 2021-02-05 11:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b0c03a7ac2ca19030784cb930505f7e1 SHA-1: 35f758dee4c822ad226fda6f56fb5de6ccc92737 SHA-256: 8b3fcc048ca9610b980a831e6aaa3fdf01883e1ca17ddef52531d009ed6afb0d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://yafferge.ru/123?utm_term=oracle+exadata+architecture+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4386829/normal_5fe0f00742131.pdfIn PDF document text
    • http://fezibinuzot.iblogger.org/bonjour_hi_running_man.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/40Y4OrJ/40809577576.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/ief2iar/53633941099.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/jivogapiuwxxw.pdfIn PDF document text
    • http://beststudent.space/96540717515o54vf.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/jdSsiix/disney_plus_login_limit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496216/normal_5fcc905ea1e77.pdfIn PDF document text
    • http://vigastlens.xyz/namewagifijtq1fq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459937/normal_5fe5972ed0b1b.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/nqGigZv/fist_of_the_north_star_revive_best_characters.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427274/normal_5ffbaf1a36805.pdfIn PDF document text
    • https://jimuvidagonolab.weebly.com/uploads/1/3/1/6/131636746/3203852.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453902/normal_5fe54498c51ae.pdfIn PDF document text
    • https://cdn.sqhk.co/gubogezemazo/HYhhPhc/11972707853.pdfIn PDF document text
    • https://cdn.sqhk.co/mobobelelu/fIfgdnu/pulasibagowa.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/hsk5ihj/32040494549.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_off0000b49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB49E 5160 bytes
SHA-256: 190d2feac938cb83181fbb74f0e140d59ae6e9354644f24c6e77ef8397056b63
font_01_sfnt_off0000c627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC627 10020 bytes
SHA-256: 853953236aa25281501f79f37dea6bc0206277ea6f4bf4cea2a6bffea20b07e6

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