Malicious PDF — malware analysis report

Static analysis result for SHA-256 edce5af156be4424…

MALICIOUS

PDF

90.7 KB Created: 2021-07-23 19:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a45f5f91a79f2d601d78783ed1095b8c SHA-1: f5a8f207a971e6247c887c2fe585be5a6d89337c SHA-256: edce5af156be4424e436e13dad246c658baaffdfcfe2f8621df612542666e058
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Application Data T1056.004 Web Browser

This PDF file was flagged as malicious by ML classifiers and ClamAV, exhibiting characteristics of a credential harvesting lure. The document's structure and embedded URLs suggest it is part of a link farm hosted on compromised websites, designed to redirect users to phishing pages. The presence of a 'SE_MFA_LURE' heuristic indicates the document likely attempts to trick users into approving multi-factor authentication requests or providing one-time codes, facilitating account takeover.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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 http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d65749a8b---73830424452.pdf In PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/30gs0gcur1riuq4btm1osdnoo4/pililu.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d596e3377e---rororakutipumawi.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16073d8485d0d9---fawomakifawuxutemukuxob.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/vaxozematupemeresiwana.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/a440f2a75e9cae08b7183e0bfebcb738/barokadufudabiginu.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/3718203495.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/foo2m7ev0bcp36t9jodgp7dcg6/83752268103.pdfIn PDF document text
    • https://ksuskalology.com/images/file/laledelajavuxime.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/65096799649.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16097ea1255f58---pukolugibabizo.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/c7a493f6c3f407b97d0db1c629dd3995/rukifaponix.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/d82021101f87cc058edb988676a1d150/dunijaga.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/d1c5e8bd80e2eec33936035a414706a4/mopukuxixiwasofofimiburet.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/10275546116.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/737b4dafe8e5f25b401ec7c131bedbb9/wipenizab.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/4cf5c30063f3594a0c52db3735d2d278/jokadowiturafenuvorejode.pdfIn PDF document text
    • http://cke.hk/userfiles/daxeziwusazipatufiguz.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/b85b6decb03f15d5f192fbf5008f2e4d/24016458089.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/jeberarijexakim.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/44050211991.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608081d90b126---wamesedivaduderixake.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/637bc0ff556178186dbc7f6bd47315cb/62088169751.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/96850039513.pdfIn PDF document text
    • http://envigest.cz/upload/file/67090867592.pdfIn PDF document text
    • https://securitydm.com/slicice/file/95060196449.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+connect+netflix+to+tv+from+phone+with+chromecastPDF 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_off0000f8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C3 18908 bytes
SHA-256: e33c1e733c07594711ac31573c0c03b22390de52bcb971e40d07921b67f31ec5
font_01_sfnt_off0001283a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283A 10992 bytes
SHA-256: 92bde0d5062eb4ff664f4781960bfe843910eef2580bf792f3119d11d6564373
font_02_sfnt_off00014197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14197 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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