Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4524cb7d081e306…

MALICIOUS

PDF

78.0 KB Created: 2021-09-12 17:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 746e3c64c775fa753c18d81d906bb888 SHA-1: 516769c05a1080a690d9d89239951ddca43f5ba1 SHA-256: f4524cb7d081e3068c0e8b6f803295172b5a843ba439863174add09f11f2f349
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. Embedded JavaScript streams were also detected, which could be used to further exploit the user or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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
  • 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 https://irlanc.ru/uplcv?utm_term=types+of+themes+in+poems PDF link annotation
    • https://genegurumiraclehealer.com/userfiles/file/24356145193.pdfIn PDF document text
    • http://casaperugia.fr/userfiles/file/latogut.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/86535594901.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/67413798740.pdfIn PDF document text
    • https://8cj2aja7-8mxb.com/contents/files/76376633323.pdfIn PDF document text
    • https://5udua.com/contents/files/19347415678.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/belilejuv.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/78505764704.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/kitemefekefilasogirixo.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/misonujamesuxuvowizuw.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5814a96cb---waxepeleb.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f731d490db---11892608281.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/63297659836.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/87565645175.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/dunamagoforinod.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/33396932792.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/91450633049.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/xevivabil.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/kukonub.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/3560882895.pdfIn PDF document text
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/katunurowa.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/86113980918.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/33982837705.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-6/20210906182842842975.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/laxikasibegubetewegakis.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/39614456247.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_off0000cea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA8 17180 bytes
SHA-256: c9491027f390c915a8467784aa7f467e3d2be284bbec38894c12b7f4b37c5a0e
font_01_sfnt_off0000fb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB00 10392 bytes
SHA-256: 61a407afe522a00a2f0b279e7167e038666482f7d26286459bf52541be1a5ce7
font_02_sfnt_off00011266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11266 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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