Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebc0fc8be02928f…

MALICIOUS

PDF

82.2 KB Created: 2021-09-08 00:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aa31878f39d2a0ad0b83099def32ece2 SHA-1: b48fcb199b19ec06e53ce80c9af647ab4f996d70 SHA-256: 5ebc0fc8be02928ff8f83645048ef1f6f3840e91b361359ae65144d4558de6a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable domains, likely serving as a distribution point for phishing or malware. The presence of these links suggests an attempt to lure users to malicious content, aligning with spearphishing and malicious link attack patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16080ba873cf26---kokimanusozirazap.pdf In PDF document text
    • https://hamzakocakoglu.com/userfiles/file/nebisefuwevojiluzolo.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/webumud.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1748a8da3---98791881230.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/43001858657.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/3d4f75c4952bae9471effb282f69271d/18381811883.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/sukozulojumebivu.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607293a8af60e---zotolakopiludulibu.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/74813949917.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/dadunitevitexosoge.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/mazokatujarebexo.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/lajapenijimixexapubuxesop.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a92fd7e275e---dukobugasugak.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/91130879209.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bffb15595---paxakolukisumuz.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/jm857sc0h9r4lj9qk9ccvn8hq5/kulukofosi.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/aiv8675kd3ogeb09kmar758tpd/89511978897.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/kabifu.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf065082cb---xodapokuxir.pdfIn PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/14113800653.pdfIn PDF document text
    • https://aitalk.vn/upload/files/33342961422.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=cretinismo+pdf+2016PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C9 18840 bytes
SHA-256: 4e0d4f1162bda532623ff1896f58ce12c39a909eb2b04d2d7b412ac19e165d4e
font_01_sfnt_off00010a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001228a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228A 10944 bytes
SHA-256: 0f2daa1619f222da04c1930e85eda313e05dff4339da5cb519a7be96dd4109eb

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