Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e45a4c99c715974…

MALICIOUS

PDF

81.2 KB Created: 2021-09-03 08:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 62dd792090edea5b17f72545769c1ba8 SHA-1: 2d73b14b11d8659a8e8c36f1a2e13e8962682c86 SHA-256: 3e45a4c99c7159748382b1934cdce2848f01d5b3983486debd068d0f35f01b93
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links likely serve as a distribution mechanism for phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/j6kffor1sq2bst42j3mom5ehft/81533892389.pdf In PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/5ab30e3014e816df2448bcaa9846e7a5/89486472921.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fd516f332a0---losulodubisup.pdfIn PDF document text
    • http://klenderbio.com/upload/files/nukevo.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68f4ac5659---55175369804.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/18149708303.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba83609e310---mepifusawan.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/jujibewopo.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/8c726c30cb1396fdd6d2f712b4e2773a/88743071776.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/gugojo.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/mered.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/nboqqe0kil6h09afp1fqdacjmt/gunolibudoja.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/mefivikarexojonopi.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43025037.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/50936443050.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/73627613607.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/sibumokupol.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/funil.pdfIn PDF document text
    • https://iohrp.org/f_files/files/63951786175.pdfIn PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/29894916248.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/vf6n2q9ntqhgsie8cp10tu80ju/xilezuxibadozuvogu.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/72156666756.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/42218051458.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=prelude+in+c+minor+piano+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/2e48146c42f06e935396a59c370a9fe2/dilunujuvagiwe.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_off0000d527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD527 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 10616 bytes
SHA-256: 5dd6ee8728fee606dc1b1ed105239158b76f02f8202cad504dc5def6ac29e5cf
font_02_sfnt_off00010561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10561 18964 bytes
SHA-256: ec6d16e4485bb631e5d9ee2aff50f5160ced6ecae872d2d8af4f4c0be2e72de8

Open this report in the interactive analyzer, or submit your own file for analysis.