Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d09218dbf44432…

MALICIOUS

PDF

92.7 KB Created: 2021-06-26 06:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bab8666a834479dcf9c5c6cb3eedd566 SHA-1: 197eed1f7cb986361f0cf218a02fc2953a2fe043 SHA-256: c3d09218dbf444325182d7557f15a18bd665cc04ad5ba84c7b986caa5251fdb3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to distribute further malicious content or phish users. The presence of external URIs and link farms on potentially disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/atgi1q1g9af8ce9gcrdh4ndkop/wazinu.pdf
    • https://welltowork.org/wp-content/plugins/super-forms/uploads/php/files/619be158f3aed6ddce095742224e9ff9/40087876485.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c2cbe3f04---63501241027.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/938e2c617360f17b78d5292c5c81d67b/xumazozulaxivunigix.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b561fec4e4---41531568756.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/f732abc441cef6ad4aab5fa2821c8a9b/xaxawebobinana.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8670b4ff69ec8e5ac3c660a8294160e9/godujo.pdf
    • https://sbsoftware.ro/admin/userfiles/file/10079144198.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/a6ae5b1d7b0f2e6ba2b3efa8f87e70a0/wonosus.pdf
    • https://mayurherbal.com/userfiles/file/napuzujugozurulifaw.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922a36738ef---rovuxezatisewumewanite.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/u3se3jbaa21l1d6c5731c1m6p2/wutusupudave.pdf
    • https://bcbc3399.com/upload/files/salakevinutiledimod.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaed592afd---redileropitofokikame.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073465d3dba3---xiwenebasotiwerom.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0d5d9bd9b---mamujesumidegamokugafe.pdf
    • http://weorderfood.com/uploads/files/wezubarumadezonalomamus.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d40ff800065---20145195222.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/4httof4tn33rdmn2chuc9ftc07/98939413849.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a76c90117---207496553.pdf
    • http://abwrva.com/uploads/files/fapag.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609476fc18fb6---32484697686.pdf
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/xufudutam.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088dece5d12a---76133606042.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=can+i+still+get+pregnant+after+ovulation
    • 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_off0000f0d2.bin
00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D2 16140 bytes
font_01_sfnt_off0001064a.bin
64515b440c0fadcc96bf8906c3addc43318c1702f23c9096aae1a99bc70383a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1064A 16788 bytes
font_02_sfnt_off000131f8.bin
e2fec0505fdacdc61b830f7089d876fe10becb6da6783fad8d492efacc1319d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131F8 10728 bytes
font_03_sfnt_off00014ad3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD3 16792 bytes

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