Malicious PDF — malware analysis report

Static analysis result for SHA-256 720c4bf9c7dc963a…

MALICIOUS

PDF

92.7 KB Created: 2021-09-02 07:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6f04a7ca2a9c5c46625aeab6799e2cc4 SHA-1: 342aa608e86c03eed57c63b301f949ff8e31ae3d SHA-256: 720c4bf9c7dc963aebdc831c56b0b0864f56e3cd9bcc0242e5233fef96a63e65
184 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content. The presence of JavaScript actions and a ClamAV detection for 'Pdf.Phishing.Trojan' strongly indicates malicious intent, likely for phishing or scam operations. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 8

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/pbrg7buvsovq7m0uioanl7grq2/vokijisiwoxigorim.pdf In PDF document text
    • https://cissud.com/uploads/ck_editor/files/mejozejolajajelip.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/4ce74795d8d9315ad347fa1b2f99b953/47705434396.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/94698975835.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/suwesosomemul.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078042fc6c0b---desoxaxogenogamixuvopidod.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945a40acf3f---38477801647.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf9cd3ee7f---17726369576.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/66038758015.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/21819384938.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/jafifakewajumikuxo.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/koribofonemubexonid.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b354d7eda9---33640701135.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160f63821cc68f---lalewisanuremewozigobido.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d3326341a---6185057023.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/503612974.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/a68d267affebafcc9d7616d320c11ebd/luwelibefi.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/29856912021.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/22958743652.pdfIn PDF document text
    • http://nomaquito-travel.com/editor-images/tupilofo.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/rchgo7dnjt479evhuvg04ickq6/80047369679.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vpejs65l7jrtsri3lapqacjiq6/mexarik.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/pemimeperopiwazinunataru.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/xaselebozigazetupe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=shoppers+guide+great+barringtonPDF 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_off000104bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 18796 bytes
SHA-256: e27495ef13dbdc09f168c1172c331e7e7703400417ee8402c2da5657ad373410
font_01_sfnt_off0001349b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349B 10940 bytes
SHA-256: eef3cc648373d6451088711e69cb4bf7622824f24ab5ae23978b2686888a4740
font_02_sfnt_off00014d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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