Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3506a8de6882f27…

MALICIOUS

PDF

79.6 KB Created: 2021-07-13 05:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 49c54a4b23a37121406adfd1d51977c5 SHA-1: 5d516fb1e6b542f1b3d783f3e3e4d6a21bff2b28 SHA-256: a3506a8de6882f27bc37e52c4410cf02368992909d7aaf807c20374bce6f90c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised WordPress installations. The primary goal appears to be directing users to potentially malicious content or phishing sites through these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6601

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 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
  • 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://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/2e0a1ff951290c87fd7b9fe549ab126b/42134005120.pdf In PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc46424b9d---pibaribim.pdfIn PDF document text
    • http://camonetinternational.com/files/file/nosajoxalesuxinubeko.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0850376474---60069690283.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/74614124957.pdfIn PDF document text
    • https://stvorki.ru/files/file/mojiru.pdfIn PDF document text
    • https://arerp.kr/data/file///zeriduzaxob.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/kozisipabijazinunedure.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/7196264609.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/247324963cdfc3072290ac8725cd6030/95498469698.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607454fe9f222---62281303734.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/fiwurevemejupu.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0cd2611cf---zimojevujinunabikarofuju.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/n3h7tne7nsogumnrmq6vocoar1/pesovafuwikurorisuzaleniw.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/xolamonaperuxuruneti.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/3a2b76110e6411f939de4d6585fef2c0/lotariko.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160824d967f686---86948107857.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/5iohulgnvnp35215ncf1h2k450/74620174758.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/rejefukomexawabadirozo.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff0cab6db5---fejokejak.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/vawenuxizipitozimevuvem.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/92ea51482f1a1480f9fb90564dd450da/61351354356.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/o3ab4dd3rvtf6nrunu3p6d1ra2/bixogajabedi.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/23970121809.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ce59d9ceb---11262393812.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/7d2ff7df087a0057aec83e3bbe3f825d/juwiwab.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/25354194996.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=brush+off+meaningPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF433 10668 bytes
SHA-256: c37c6d84f7955894d6461be1ab35b22bd49edc725fc4e2e81faf50a1b1d17682
font_02_sfnt_off00010c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7D 20276 bytes
SHA-256: c1215c1b129d7c757fef8d4b4ee14a6913f327888f3c6864925172f36b42aed3

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