Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b5a99a31cf8cac…

MALICIOUS

PDF

84.6 KB Created: 2021-01-26 10:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d082c5721f8b92cb57aa67f868ae8370 SHA-1: 5a9a08daf3be8817448ca74bcafae04b13ca1ef9 SHA-256: 76b5a99a31cf8cac0dff8efbaef9112e27b9f703965bba531ab74f2024ad0291
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many pointing to PDF files hosted on services like weebly.com and s123-cdn-static.com, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no explicit script was extracted, the PDF structure and extensive external linking suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8200

Heuristics 4

  • 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
  • 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://traffnew.ru/aws?utm_term=aghorastra+mantra+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484365/normal_5ffe8630068d1.pdfIn PDF document text
    • https://dujibirarikow.weebly.com/uploads/1/3/4/3/134321406/mekuvupigogoxaj-jomisejowade-bimajesi-xunemupukivire.pdfIn PDF document text
    • https://sabiwivilo.weebly.com/uploads/1/3/4/3/134316676/sakesupepu-jinog.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/ezimhh6/wufowozidunusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421477/normal_60027d4b4f8c7.pdfIn PDF document text
    • https://tafedelimege.weebly.com/uploads/1/3/5/3/135345870/zupadowopagewude.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/hh1hjha/zipojategudetipaputa.pdfIn PDF document text
    • https://cdn.sqhk.co/bosavoked/gdtqhf7/vmware_horizon_client_download_5._4._2.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/iieIdoQ/crazy_taxi_3_high_roller_steam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452217/normal_5fca0b0eb7998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5fe2132bae5f4.pdfIn PDF document text
    • https://sazavilekin.weebly.com/uploads/1/3/4/8/134851962/padez_dekawukaweboge_lexor_jewetulisudeg.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/jupapetogakamu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 5412 bytes
SHA-256: 9cd4c4353e9088187a292f7ee5ddc5308884463fa5b030867644a99e3a158c35
font_01_sfnt_off0000f9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00010525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10525 9796 bytes
SHA-256: bbdcba8178e78f4a02b11a4a4753cb10ede4df9b31cc3763dd89eb3e8594fd1a
font_03_sfnt_off000118b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B2 16112 bytes
SHA-256: 067695ec35e22d3f2573ffaad0aa185f8394226408f7c689e514996743215f9b

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