Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ec64ea0e740a00…

MALICIOUS

PDF

82.2 KB Created: 2021-09-09 02:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dcd7c75cc8b2c7bf158a4fcbf10fcbfe SHA-1: ba9a3cb7c6e1267db5787f6985d69fd0033d0b01 SHA-256: e1ec64ea0e740a00ab49373b3fb2b32b439dcc7ba8f29734b445e28916111aa3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, such as 'https://oniceh.ru/uplcv?utm_term=watch+fallen+online+free+1998', are likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://oniceh.ru/uplcv?utm_term=watch+fallen+online+free+1998 PDF link annotation
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1612f37257133b---34254982477.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/nijegukefew.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/pumidetijipimesazerudijip.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/terufikum.pdfIn PDF document text
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/7331351746.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/sagipuribajefazuvupeziwof.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/pawababerid.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/28316468770.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/jemizuvujugoj.pdfIn PDF document text
    • http://szcftz.com/upload/buzogatudanuxazepotumofa.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/bimakaviwidufodelitov.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/77479277714.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/9442076871.pdfIn PDF document text
    • http://marketingnews.fr/images/file/gatuv.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/nivarasat.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/zozokuvijiribafibe.pdfIn PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/zobefuto.pdfIn PDF document text
    • http://hanifeugur.com/image/files/25183955304.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///zarepapipuwemu.pdfIn PDF document text
    • http://jonellchem.com/upload/files/bokewamagotixetu.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/bamexil.pdfIn PDF document text
    • http://apcmagon.com/userfiles/vipojekamidon.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/29968029230.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/visumesikezekofavot.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16133b16ed83ca---razotogapazadij.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/xafafumomatelel.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b2ce7301a---96455273270.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_off0000dc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42B 18052 bytes
SHA-256: b11d9a7d4b959787f038682791aa21b16106c52ab7939fed27eef585650d81d3
font_02_sfnt_off0001228f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228F 10684 bytes
SHA-256: bb0215c8bcb4f7bc25fc63c70221b1817fbc1bca13381a03678a4eee572d268e

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