Malicious PDF — malware analysis report

Static analysis result for SHA-256 510e0ec11675bd10…

MALICIOUS

PDF

73.2 KB Created: 2021-06-26 01:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5d78b58571269b164eb42c310ac3124 SHA-1: 9126bc2cac7f3b49793cf60d80b598390da8bc71 SHA-256: 510e0ec11675bd108ca7d6bb5ffccab6714fa4f0ed7c3984c6d3873753f9bc43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The document contains a link farm hosted on compromised WordPress sites, suggesting an attempt to lure users to malicious or phishing content. No scripts were extracted, but the presence of multiple links to potentially compromised domains indicates a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/b290e91ca8b8cde60bc0c4075c727e84/20695586009.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/if3ud5k61b3bj00n1r4et6c6f7/xelubemudowanome.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608199930e3e8---vorikuzitawesogisu.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/nc2vg87eac758ednujr1qhtc88/34175524306.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160784fb720781---95269587501.pdf
    • http://ahcxdq.com/uploads/file/272216007999.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607099b33e81f---kekuxuvilunaladedipena.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/af2f26c766007f608bc884054ee310bb/rororarunale.pdf
    • http://abimobiliare.pl/pliki/File/xufagozafeto.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/3a6e09a1dd11739c332a6a87f224a9c2/31938026706.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbfef86993---36126214768.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/jnjg1h2l7vs54d48ovekgdm42r/29358960622.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac249b7ea4a---finebog.pdf
    • http://kajsanordstrom.com/userfiles/files/44670986333.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608d217c22135---21724810097.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16072dcd5c975f---diripagav.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/7909bcef7b539225db0cde4bd4df6ebe/67319511904.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160c949edceedb---27354447921.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/a73ac749c805ba7f2086d35e989b30d2/85169244320.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/drsru1921tlie90b8bmd6gf1o3/42150049982.pdf
    • https://abofahed.com/userfiles/file/12171855070.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/k3aslo4moddtklmvce2ssmca8u/tedulifefujem.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd91d4778f---96858535989.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/a21fb28db77a9c5c718974334474c751/48771114542.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=advanced+and+intelligent+control+in+power+electronics+and+drives
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf09.bin
6be2ef576ba8c8c28cf01b9ce81c9706a098484cc16856f3b7c334c5bd8c4034
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF09 15264 bytes
font_01_sfnt_off0000e5c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C7 16792 bytes
font_02_sfnt_off0000fdde.bin
66de81887ed623896278cdf0a71208d8f06827f9d799157bb72cb0ef0088f123
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDE 10824 bytes