Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec30289bacaa3b1…

MALICIOUS

PDF

87.4 KB Created: 2021-07-24 18:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 39c25871ad2fe340da88664b307d669c SHA-1: 815e20112cdf385d4200f451a73384bf6d51097d SHA-256: 8ec30289bacaa3b166996045d8b04cda8c50e9872eef2ef92eb814a78f560e25
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a phishing attempt. The heuristics reveal it contains a link farm pointing to compromised WordPress sites and impersonates the brand 'Apple' with a call-to-action link that does not match the brand. The document body is unreadable, but the presence of numerous URLs and the phishing heuristic strongly suggest the intent is to redirect users to a credential harvesting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+do+i+download+tiktok+app.
  • 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://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070bfa915ad7---gukidubemolekakuf.pdf In PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/5971269948.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/3e33e8738993dc098f1e217ff8ffc69e/16188134290.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e63f0daa1---bosolunigikagajipawudez.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/r7n30def0o23tpnd4lsjlh0osq/wopafalakarivudunakajaset.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/doq70jkqpao1q130k313khssn5/korovuribuxuxetik.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/45325555695.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607e752422561---lalugakuki.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160801c442e4da---51374101223.pdfIn PDF document text
    • https://technische-dokumentation-hoffmann.com/upload/files/mapulu.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/54440305499.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/9pgqopm1fpmdue289t73use7c1/zawifetunadok.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/99252244776.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e1fa4e1443f---pewib.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/ziviwikubo.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/9e6177d28fb2bc4d3d5722af03a1b793/papizogu.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/hfg6shrknhh81lop0t9ivgpq36/dekunori.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/d9fde57777c60fd07891a6c2a004debf/sepupumogotilafomedelafut.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/3834013992.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/wufalivosibajugalex.pdfIn PDF document text
    • http://fructusartis.com/i/File/86570179258.pdfIn PDF document text
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/lulujukorikawe.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/43525067271.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/392b71e4ab42a45a98fb706dbd527a69/97246681585.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/4413044c76393c38c36ec8e6fcfa5ccf/54686816609.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+do+i+download+tiktok+appPDF 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_off0000f36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 17384 bytes
SHA-256: 69fd3e28ff571f2f5f9465a060210d45275d7ee27df9b6cabef57d04a05a4e41
font_01_sfnt_off000120d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E7 10152 bytes
SHA-256: 3c1b38b7131f57ce810392209f86db0a37c2bf22e79605319a4b0895bc457a4f

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