Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f49140bd2e534b…

MALICIOUS

PDF

81.2 KB Created: 2021-09-15 19:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d09a1f3c3385a4a410564eec688cdd42 SHA-1: 7451cfa880e1f0c089822c03b42d40666c4b4112 SHA-256: 98f49140bd2e534bf2d82b041e62a2ad81d1c96ae158db37b1495eb02ec36fbc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and multiple URLs, some of which point to compromised CMS uploads, indicating a phishing or scam attempt. The heuristic 'SE_CALLBACK_LURE' strongly suggests the document is designed to trick the user into calling a phone number under the guise of a support or billing issue. The embedded JavaScript likely facilitates the phishing or redirection process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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://chiangmai-clean.com/user_img/files/jirixatimitajokiruza.pdf In PDF document text
    • http://flynewsletter.com/uploads/file/1052979807.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/dibizafib.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/t4sapkia7nl80e0q48gm0m6bmd/8157413167.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6d8c8a7b0---suxonosigoruvizezowo.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/kugilagemigojazeto.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/fiwenodi.pdfIn PDF document text
    • https://0900107678.com/upload/file/51139619512.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137fcaa2e933---21873976430.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/lapafofivobefarerotum.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/jefunanosovelef.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/90507208017.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/39434812264.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613045246e304---xefowetal.pdfIn PDF document text
    • http://toroisg.com/public/images/files/jegunopodowosumiv.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/susiroxusivaxefelu.pdfIn PDF document text
    • https://campermagazine.tv/public/file/jozupesaral.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/10079887146.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109101228486551.pdfIn PDF document text
    • http://klccpa.com/userfiles/file/voguzakanadexerufupip.pdfIn PDF document text
    • https://aayams.com/userfiles/file/75173384248.pdfIn PDF document text
    • http://maidichike.com/upload/files/bozowukamijoxuxaju.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/84081076051.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/gafezulevegojoretejoxid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=physical+metallurgy+principles+solution+manual+pdfPDF 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_off0000d575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD575 11280 bytes
SHA-256: 5ab89a60c49eec6d8b0decdf7dbe51548dad81a887ad04f77bfddcf23d15dbaf
font_01_sfnt_off0000ef99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AB 18000 bytes
SHA-256: 991fde2b37681a7164ebc2b35072be83e27e5518efe4bf296c17a8e252717f4d

Open this report in the interactive analyzer, or submit your own file for analysis.