Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a81d6b0089431c5…

MALICIOUS

PDF

88.2 KB Created: 2021-08-17 01:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: da9ce46ed64782517e44ff71c0812182 SHA-1: 24c24a3e05741f69073ba99b8bb165a469599b61 SHA-256: 7a81d6b0089431c5b7cceff8bf6fa0c6ae600b40612843ca2e43070930edf1aa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and exhibits characteristics of a phishing campaign. It contains embedded JavaScript, which is often used to obfuscate malicious links or redirect users. The file also includes numerous links pointing to compromised websites, including WordPress sites, suggesting an attempt to host malicious content or phishing pages. The presence of embedded JavaScript and external links indicates a likely attempt to download further payloads or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=dr.+bertice+berry+books PDF link annotation
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886d11d0c69---watumedurunade.pdfIn PDF document text
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/55198997449.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/fa52a2ca247441a820ae2c116cd01e8e/rirolesaxenuvun.pdfIn PDF document text
    • https://isosklo.cz/uploads/37528670535.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e65d6b3dda---laxujubunix.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a541c90f1---rakul.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/1c5f9ca2521c464a7ee8b14e0759dd1b/gadowekijaseguwejejopox.pdfIn PDF document text
    • http://aplus.to/userfiles/file/39416309522.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1610d550a4811e---63425953543.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/84696738731.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa97bd3d01---pipofesu.pdfIn PDF document text
    • https://dm288.com/slicice/file/delik.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/davozakizove.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095fb7e662d8---mokana.pdfIn PDF document text
    • http://yfatc.com/userfiles/file/85138165024.pdfIn PDF document text
    • http://zuche0551.com/upload/file/42886065097.pdfIn PDF document text
    • http://dichvuwebsites.com/media/ftp/file/26133723643.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/38937014415.pdfIn PDF document text
    • https://bczenekar.hu/files/file/padofone.pdfIn PDF document text
    • http://rahwayhigh.com/clients/42761/File/fefunorixosuw.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/taviloligekem.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/jegph9iuamjjhl34agup6vb2uc/14060215824.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0469056970---potuwatesagubakufunubuju.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f63f725bfed---gifudinavap.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609beae3937c6---tevemavebuneda.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BD 17328 bytes
SHA-256: 22a3a4461696547bd9176580239766f9ee46185ea36449660fc7a7b625ad53ca
font_01_sfnt_off000123c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD9 10324 bytes
SHA-256: 1320711a852295a771d6b50dec940421db2cad86e185303c585a24db92b5e7af

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