Malicious PDF — malware analysis report

Static analysis result for SHA-256 404bcfdbc34cb5c1…

MALICIOUS

PDF

75.7 KB Created: 2021-04-03 14:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3bedb8f92b37804fda5137985c376b65 SHA-1: 9f27ea78241507f5c369f18dd821308bbeb306b2 SHA-256: 404bcfdbc34cb5c1a82c3516b4c6c639446770863aa7bfd518c55ea38b4ec683
156 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. 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xajibur.ru/strik?utm_term=how+to+find+ar+level+of+a+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fe21832d5bc4.pdfIn PDF document text
    • http://obzorov.site/shrinking_ice_sheets_and_glaciersa2ysv.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/FUgciaO/sad_anime_couple_pic_hd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500417/normal_5fecbc7a72d88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420036/normal_60013a5cd46c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408324/normal_5ffdf895379c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fd0a6768642f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408588/normal_5fc697864222e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373997/normal_5ffa747575a36.pdfIn PDF document text
    • https://cdn.sqhk.co/zupivikeg/iOjeoUB/nfl_standings_2018_week_8.pdfIn PDF document text
    • http://autoport76.online/anger_management_certificate04qob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_ea44947ac22442158544c7d8df11e1fd.pdf?index=trueIn PDF document text
    • https://12c21f6a-324e-488c-af83-7e1076049286.filesusr.com/ugd/e84f25_772575b0035c413a80b6bdd39adb65f4.pdf?index=trueIn PDF document text
    • http://xafonabikox.rf.gd/cirque_du_freak_cast_list.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_41d77f7d2d284efebd9c705e5d338379.pdf?index=trueIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_75d0622b00bd4aa39cc2ba290dd1a38d.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_9adcff88554b4f1eb26ffb9311519a54.pdf?index=trueIn PDF document text
    • http://sisizovomejefi.epizy.com/juxegalewo.pdfIn PDF document text
    • http://jipowefata.epizy.com/84326398542.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 5040 bytes
SHA-256: 0152f7e9ed01c97f844f7139662a5d12dc3eeeae5356e56b957d65234c874634
font_01_sfnt_off0000fb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 10900 bytes
SHA-256: 15ce2afe96a2a5a7b25e18788927e8b33fcbd9e5e65ece5e1660c24ed7935670

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