Malicious PDF — malware analysis report

Static analysis result for SHA-256 469b962e6f3c2ae1…

MALICIOUS

PDF

77.1 KB Created: 2021-07-09 19:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e4c85922dc4b3f941ae896062d947c59 SHA-1: e8deabb78b00aa5e3c695df3971d3037c9f10741 SHA-256: 469b962e6f3c2ae1b45c3b2aa89d4f3d0b08198aaa9bcb5c4f937d8981bdc05b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a callback phishing lure. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute a malicious payload or redirect users to phishing pages. The document body is heavily obfuscated, but the presence of PDF link farm heuristics and the callback lure indicate a social engineering attempt to trick the user into initiating contact, likely for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://coretry.ru/uplcv?utm_term=greenfield+daily+reporter PDF link annotation
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c6f3514d6---96176448809.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/76364467068.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751d057a99f---29787006108.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/fipoxez.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/tefaponerevemuvogorupuz.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/70c14f23e8b36654f648be15d40082ae/vebenema.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/n7a3avesrhtq1obctufvo1kuo8/17395576861.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/ibtj1rur98mlnndi5erprs2t3o/64997116598.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/denovamefof.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/gibegumobepatan.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f054f0f6b---nabuwu.pdfIn PDF document text
    • https://egca.fr/userfiles/file/50781917501.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6f163712b---27934001621.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/hpaj3or0hr5fjtaog8qvk7tj55/66643305762.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/5c283a66fe39090ab8fdf0758933e6b4/lisagolimofafalikemumewe.pdfIn PDF document text
    • https://sinarwaja.com/account/files/19955353370.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/5af953289376b2b79140055b3a29f277/7457649250.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/935e9c8eeffd6c73f65e9a50527b0fc1/fifopifozusidatiridezuve.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/eqhpigkaf9fstl3u6a5vhoqb02/29641050093.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/6e26a548d56cb0edd89f932f4e2e13cd/47917361481.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/zigebutejorebebuponagi.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88e2e2f35---43115332723.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/76736884556.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d388e7f43---vexafujoboxulinuj.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160985597c65b0---47923394675.pdfIn PDF document text
    • 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_off0000cb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4D 16812 bytes
SHA-256: 088657599c131a90e3000c1c4b13b8dc7da3569699178c775cfc0fe2c204d1c6
font_01_sfnt_off0000f735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF735 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4C 10476 bytes
SHA-256: 4aaa354d0323b2f9974341a616b04b6ec1d11d6bedefa1a4f2286f2e4d804b75

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