Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02ba7b3d0c02b3a…

MALICIOUS

PDF

72.7 KB Created: 2021-05-26 19:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2297e39ad6a2ed25f005593f150491d SHA-1: 00ab10592882bd44533f13b923603459da47c3ee SHA-256: a02ba7b3d0c02b3a0b34527d074ddd929d56b57c309b1b0b4594694909687cc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to software license keys, likely a lure to encourage downloads or clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://inwebjor.ru/uplcv?utm_term=codigo+de+licencia+easeus+data+recovery+wizard+trial+gratis+2019
    • http://aylincinarli.com/fckfiles/file/87190253157.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0ac8946c5fea2fa7bc7d06804b125eab/wapisikuvijumogezisutaz.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/68032032c5fa0009b39abf4a601aef88/25945565805.pdf
    • http://iglozawiercie.pl/zdjecia/file/58262480438.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/fb7113ba5c85c00a212b477106e6b9a5/88644757215.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/mr046t1t0blubjb22a8tp90tlq/jebitudisofopowoberunuxa.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/c4169a1e59387c5ec0806eaf5ae12309/64031464538.pdf
    • http://www.deep2001.com/images/library/File/60610507770.pdf
    • http://bajcsidavidfoto.com/_user/file/19697841995.pdf
    • http://learnazia.com/fck/imagesfile/21268940785.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16085834672a0c---nosetefasabaze.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a913f2dc8f721ae086753d4e50491c9b/damorosipu.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd312a0898---93583737996.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac05ad58a85---68670671534.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d014.bin
23fdd657a05729af4aeb775909aa2349d0bffc41e2c987cd31571737f7e8de5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD014 5800 bytes
font_01_sfnt_off0000e3fd.bin
122d5ce2680e2cda5dbe89f51f7a264b4b58b8af4507d041c51f70531995316a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FD 10388 bytes
font_02_sfnt_off00010754.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10754 4324 bytes

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