Malicious PDF — malware analysis report

Static analysis result for SHA-256 50752e05f8728998…

MALICIOUS

PDF

80.8 KB Created: 2021-06-09 02:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f87805c6a738866b7aa3dfc7cecb045 SHA-1: 0c77cbd3d38955a20c85393ee1d454f11902c927 SHA-256: 50752e05f87289988a78689896416e03e64260a42d9a1ce5ad3f6d2ac3c14fe7
156 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many hosted on compromised WordPress sites, that likely lead to malicious content. The document body, though heavily obfuscated, contains references to 'clash of clans xp hack', indicating a lure to trick users into clicking 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://catamma.ru/uplcv?utm_term=clash+of+clans+xp+hack
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a589b9972---rovesofuxosuxobobima.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84c35e0dc---10280308516.pdf
    • https://mt-creativestudio.com/ckfinder/userfiles/files/nigijonofag.pdf
    • http://skiflogistics.ru/userfiles/file/21581969931.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160757cab8d0b3---25241823424.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/wijobajegujaxigajufalotal.pdf
    • http://donghozibistore.com/luutru/files/lixemimuvenova.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/910714ff2c056e1915f246ba670f890c/27868204389.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/4dt32sidjgmc79fh8u0qs9dco4/2613320520.pdf
    • https://pacie.vn/web/uploads/files/66053064449.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/f63ee40c906b615baa968565479ad136/zofololivotegavu.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/5kgakvajqkhark0vcuguvhgrln/73041028912.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609272afaf3cc---mikarinodiralupugadobok.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efea1bc024---mifedigel.pdf
    • http://aaaexpressac.com/userfiles/file/babobowixesovopupo.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cdf68ad2d---42641433294.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e19e.bin
21e7e49343aec5a629bc43b005a7dfade2f997dbf80fb21333fd1c99d1e8513e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE19E 5044 bytes
font_01_sfnt_off0000f2d0.bin
1de12393592fc085138d8c0cd62367bd0a13a906f2d1d4d1d7a19f6548a56d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D0 12956 bytes
font_02_sfnt_off00011be1.bin
169ccfb14b9e0695d3f269e66f0803d7f09d65e92efd4926d531b7bab5548fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE1 17532 bytes

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