Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa201c3314ba24a…

MALICIOUS

PDF

110.6 KB Created: 2021-07-30 03:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d85f85e5fc009511c299e0dadaed8b06 SHA-1: 064f4ba08d77edf3cc134b3e1ef857347fe36399 SHA-256: afa201c3314ba24a6ae152f1f7100cb05ff403a5be34ddb14403590a74a92a7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress sites and other disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to lead users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

Heuristics 6

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://cructi.ru/uplcv?utm_term=club+penguin+island+mod+apk+download
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7134570bf257b8d52c5c9ddea2f8262b/jetugarupedo.pdf
    • http://cuanhomkinhtoanthang.com/media/file/kibinenebunawibari.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/3pgd6mh7mam7m4mnst4ev7jfqi/61606042739.pdf
    • http://firmykominkowe.pl/Obrazki/edytor/file/damirezot.pdf
    • https://hosvagyok.hu/userfiles/file/98622282069.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d98c6c64306---41941454941.pdf
    • http://www.allatpatikapecs.hu/images/file/gaduxifarune.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091321d7fa25---tubulogijopaj.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a012653c38b---75013358095.pdf
    • https://houstoncoinshow.org/FCKeditor/file/37615329809.pdf
    • http://brooklynsmokeshops.com/admin/images/file/66170785121.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbbee29542a---ladajuziwosazubuzexiw.pdf
    • http://www.niziointerior.pl/upload/file/30812889571.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab6865cf37---zubovubenazododewekana.pdf
    • http://liccuza.ro/stiri_files/file/77536356043.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/032c8b228ce0388cc481c4f2e0f0847a/22687086414.pdf
    • http://fonnepal.org/userfiles/file/89535176711.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/f14d1e1e3cec269dc64b4ea0715f9db4/21636949516.pdf
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/75133923716.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160732ab6d1796---tikej.pdf
    • http://madmojo.com/fckupload/file/69630491713.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b821f3212b8---welojumew.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/03f4cb0016f9625dbbdf678ff12309ed/fowenoni.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/b6dcd89235b8607797ac407df47b9cdb/28866355042.pdf
    • http://moodyhighclassof70reunion.com/clients/2/24/24f6aee67edc386a60746049a176a33b/File/37515523010.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013324.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13324 16792 bytes
font_01_sfnt_off00014b3b.bin
b729ee2d28302305ac1eee8bea17c65a2bd767035e8ee8829a233183bcd6cb9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3B 10988 bytes
font_02_sfnt_off00016454.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x16454 16092 bytes
font_03_sfnt_off00017995.bin
688d307721204831e1841f35b663318a8fa728bbe4db28a3eff5e1aa43271d3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x17995 18932 bytes