Malicious PDF — malware analysis report

Static analysis result for SHA-256 2270ca520e8f2baa…

MALICIOUS

PDF

87.5 KB Created: 2021-09-21 04:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e506b41e06d3f250e312c57d3a40a9fa SHA-1: 0e6fcee8985f6913301927df23b33ba0eeca164d SHA-256: 2270ca520e8f2baad5d8375a4c483ab387eeb599cfd3d460d15392486eda34a9
146 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic analysis indicates it functions as a link farm and contains a callback phishing lure, prompting the user to call a phone number. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites or engage them in social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://futurefacesmiami.com/uploads/file/59288939199.pdf In PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/816f49d97141469de36e0953867af90d/tamewopeminelujikijosow.pdfIn PDF document text
    • http://www.bash.cl/media/file/jinorapepotopodalifajal.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/1210466976612f058b8743a.pdfIn PDF document text
    • http://hzosm.com/images/upload/File/78962426727.pdfIn PDF document text
    • http://jfe.hk/userfiles/mudafaxurivabizijovawev.pdfIn PDF document text
    • http://manu-transport.com/documents/file/5271369497.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/vawogesiden.pdfIn PDF document text
    • http://deforma.it/userfiles/files/41681394841.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/30846129908.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10367352927.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/kofokinesepagomimaxorun.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b36ef10f25---busojexeserol.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/82956172816.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/wijozibekijuronotet.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/lejikomoso.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/33526072693.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/jimebomobojadiwikab.pdfIn PDF document text
    • http://tctrack.vn/images/newtech/files/webobebikeguteperukog.pdfIn PDF document text
    • http://nayyaralidada.com/alpha/ckfinder/userfiles/files/81059442478.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/78507324347.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/36488895251.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/73192889005.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=must+have+android+apps+for+productivityPDF 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_off0000f23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23B 17192 bytes
SHA-256: 3b3070b143f3c81557fa64cf0f10760a4bffebcbb85b60019097a2632002d426
font_01_sfnt_off00011ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BC 10944 bytes
SHA-256: a0aeb7d3e91569d8f3aec19e6c6a49e4f35d87427890b80dec056c1d6b77397d