Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5ad1648fb7c739…

MALICIOUS

PDF

102.7 KB Created: 2021-07-17 08:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0f67ba3e2487bac7ea01e9505ed184da SHA-1: 998be0e90a5f62477fa0e544e5f0baf6a758cc09 SHA-256: de5ad1648fb7c739286a6d3d8cf955edd5ab176a1661bd1b100123c27064017b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm with numerous URLs pointing to PDF files hosted on compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript, though not directly executable in this PDF context, is often used in malicious PDFs to exploit vulnerabilities or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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 http://angelofthewinds.net/ckfinder/userfiles/files/99342919085.pdf In PDF document text
    • http://asiavent.com/UserFiles/file///23816177831.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44508685454.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210626_B4D1E10549C229B2.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/8896394573.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16099dd2a2726b---nosipiwikebogimivedumag.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/5hai1nds084lrnc413lnbn23ui/69379824855.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/i48qaem2r20l9tjq52kjrqc3sj/78250056369.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/12053750013.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7f570a165---talidajopomudo.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b09d7ea9ee---54266549574.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/61165689216.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/ec3443704293e5cc3b2458afbbe48c16/zakojevot.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/84740440672.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fbd705099---69236091959.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/ruvefemuninajisim.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/bisuvu.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ec4730c4a---49813218426.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/11384119266.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/41652346795.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160adf1136ba4a---15279618302.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/20b92cfc09f4c6ea8c879a436d3ecfec/77240702437.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/matopeta.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/crm3etmb7lvkm52c9nku47ivpo/sadakemiviwiwurukep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=pirates+of+the+caribbean+tides+of+war+mod+apk+downloadPDF link annotation
    • 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11631 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E43 17816 bytes
SHA-256: c694d3da070ea0350773e4aad2dbba5459e05ddb56b7b0a99f6a90d106d238e2
font_02_sfnt_off00015d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D2A 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_03_sfnt_off000172aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172AA 11204 bytes
SHA-256: 9d6c8df9d9244eb9d840baa91fb59bc3291ed16a2838fd69dc893d25b8f26585

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