Malicious PDF — malware analysis report

Static analysis result for SHA-256 7371fe606c0bc949…

MALICIOUS

PDF

82.5 KB Created: 2021-08-12 21:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 4b7f8ccd55acbebf8e40aa7299a47e5a SHA-1: 00a6baf06cb0a45737bd62146ef246b7e7326a40 SHA-256: 7371fe606c0bc949ef86aacd992051e6abaa2f89ef1bc2a238d5409fddfc982c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs, such as http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160815edbb5776---94774394253.pdf, are likely intended to host further malicious content or facilitate phishing attempts.

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 https://chmelo.hu/sites/default/files/file/divareditakelavesepowi.pdf In PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/60ea75b0db42aa2a3de90b89672ae8cf/tatanenuvewefok.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16103afc6af548---49141601947.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/15272123853.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607429e950d36---vutupawanumelenorulasub.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/dejaxidigajiwizer.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/27087902424.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdf548be0a---bezefonunolo.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/33026614327.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160815edbb5776---94774394253.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210716140506.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/dbd2a1ed67f2ee45d895edfb4bf8472e/70679461074.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/91333959618.pdfIn PDF document text
    • http://mahkotacare.com/tmr/userfiles/files/11708629712.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/fajajigilomubebovepub.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ic7ufji5g8go2277lkde26jj61/sazamuselote.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/10467203214.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/70bret80tj8ujar2juc5280hk0/nodedidujusemobuw.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/89284100872.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf999e844f---tasofokobuniweguv.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/zewigifipedot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=cuentos+de+barro+salarrue+la+casa+embrujadaPDF 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_off0000dcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E9 17784 bytes
SHA-256: 319dcb25238241427424fcb86befd5cf6dd9a10df13cf3b6c3386ad58228d01a
font_02_sfnt_off00012162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12162 10840 bytes
SHA-256: 6170a39192f081fa9c951f58f11d4a412620aeba57a5890d51e9db05431f8c33

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