Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e5634c6dc254a9…

MALICIOUS

PDF

70.4 KB Created: 2020-12-01 03:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bf88ff067291a3853b179a70654584a2 SHA-1: 9d86b2b8f27f3329ca200b637dbdaf72e4977041 SHA-256: 60e5634c6dc254a92ae720c88eb520277bf1ef69d8f1fc51138a242baaf43e88
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 0.9997

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 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/123?utm_term=the+guide+rk+narayan+summary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454054/normal_5fa225f956e6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_5f92030fb8ebd.pdfIn PDF document text
    • https://gizibufunete.weebly.com/uploads/1/3/4/4/134492386/0daab0cc.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/wipekipu.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/wikezunafaba-pozipopifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_5fba86ef33da3.pdfIn PDF document text
    • https://titezexi.weebly.com/uploads/1/3/4/6/134639754/238505.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf609fcb3e0f5771471c90/1606377656837/tenafene.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2be63405d5340f3359679/t/5fc4eaa561e25426e1d22a49/1606740645281/fifa_15_cheat_code.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dfc5405d5340f3296f29/t/5fc595d66457125654fc067d/1606784471324/gukuse.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0b7661e25426e1002d79/1606290295771/42903738411.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe201c9ee0f32b871ca058/1606295582463/puluku.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB17 5016 bytes
SHA-256: e2070f7283caedc3f27abe30a32d86eccde80c65853a3f83ca13110435afe23b
font_01_sfnt_off0000dbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEC 10264 bytes
SHA-256: 47c6684e877df44f9a6ab5fa70f383e93aa07e5d608eee77d0ec128115cd74ae
font_02_sfnt_off0000ff31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF31 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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