Malicious PDF — malware analysis report

Static analysis result for SHA-256 1183982a51ecb01d…

MALICIOUS

PDF

102.0 KB Created: 2021-07-20 01:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0fc84666fb1eab069405f5193d4fc236 SHA-1: bf7017161f476318c6ff75e5a97d688a63fe55c9 SHA-256: 1183982a51ecb01d8d3e073ab662a5a9e0631a4f01b46980b21ff4a6dbdb154e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure indicate it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee89be7577---86246931429.pdf In PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160733124400c8---gududekenejiramolegusiwop.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/f681ab3f50e884808a676d910cb04797/tedeletojojul.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/0c8bb5191054cb390bc9188a14b809ff/36204368977.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/34537775505.pdfIn PDF document text
    • http://turatabor.hu/media/62014174454.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1b6d6971d---rizoxuligamusizixefupego.pdfIn PDF document text
    • https://go2germany.ru/files/file/fakoka.pdfIn PDF document text
    • http://charivne.info/images/file/48628751240.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/9db2a6de7e3e96f22147b926251918d0/31428492523.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/62411156500.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24755517923.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/32714aefb8256904d88d43262486af98/visoxosejofujixil.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/rusofaweparuruxubo.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1271ea6a2---95639899200.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/7b8a851b62fadea5506989552f79070f/moriwura.pdfIn PDF document text
    • http://50.87.25.18/sites/default/files/files/badidurufemapaw.pdfPDF link annotation
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a55e282bac7fc0728dad4db8eece830b/sojevufi.pdfIn PDF document text
    • http://hoctienganh123.net/upload/files/manilid.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/9cde81b60e2b2caa431d9b9a3d90d383/42855301420.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/a3vul93dnv2ucortnq9t86oqu7/siporebiwewujege.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/farewavewuvuxisikerosul.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/3njpe5m8lptcsnagtolhctrj5q/sunudaroluto.pdfIn PDF document text
    • http://piecco.eu/upload/files/50744116239.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdceff45179---wifezivipigerabamuwufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+reticular+layer+of+the+dermis+consists+ofPDF 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_off000129a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A7 10916 bytes
SHA-256: 71572f6759ff88cc247345e950438750c2cf7783a8119cae45fb8981db301626
font_01_sfnt_off000142ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142CE 17464 bytes
SHA-256: 50e208cd47c016d3e9073231df2025bba23456b0163d8e8202fab2e6b10edc57
font_02_sfnt_off0001704f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1704F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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