Malicious PDF — malware analysis report

Static analysis result for SHA-256 398091f102ca796b…

MALICIOUS

PDF

102.9 KB Created: 2021-06-24 21:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e7fd5e6e46727deb68448e656dc51964 SHA-1: f269c83b30fc99828d9a5e0385cc480ee5ecc313 SHA-256: 398091f102ca796b4950ae073fe4e8d786585b39be2621dc90d83e2ccbe75786
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • 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 https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/e6455b5d5308cf33adce01777b7bde46/wijowepuriwigabowavuxesit.pdf In PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075bc6cad15d---88551679898.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/8ef45165ffe7e0cccdde9c0e0aeac822/78976922774.pdfIn PDF document text
    • https://aedwea.com/upload/foto/wifukorutoguso.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/56ee1d3935b43bd25d00128f2975a533/17952287578.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d8d5e206---lezejidumakek.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/2829285922.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/efn7g618ai5srip754otr6gb3m/genuzifudoxipem.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf3224053c---mifazotebemisipuzi.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/s94tddfi054g70qb76dpsptltp/wiguwitunusedu.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ff084862a---fexovixipijoku.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cba2d81a05---munam.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0ff76707a---vunijativoguvid.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e7131f8b6---59498301046.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160998e2bad520---81139582282.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607283d0a3c62---rumuv.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085b2ddb34c5---jenexowidove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=telugu+ghost+stories+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://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 5044 bytes
SHA-256: c5996644f5e70eee6bf1146ccb443f21164973d6e714d54595560490f6a2af64
font_01_sfnt_off0001138f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138F 3140 bytes
SHA-256: ec3b3454221093fb957679703f7d60f4689aa2270c0857d320a64f4e7f13461b
font_02_sfnt_off00011fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCC 3376 bytes
SHA-256: b37d44dfaddbedd749ff95045970cb958701c4e1daaee49713bc28b597252c94
font_03_sfnt_off00012cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFA 2732 bytes
SHA-256: c1d9abf6aa40335e4e0ac9d9e830d123c3c7bd717c5e998d2573a44694611611
font_04_sfnt_off000138fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FD 12288 bytes
SHA-256: d909be8866c1381d6ebf79748dc92df79040e7f7137b5858b3173df4e1cf4489
font_05_sfnt_off00016032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16032 17340 bytes
SHA-256: 30703fe12ec54fc228daacfee98494cb003bc32bc4c02adb0e25afd88f50387e
font_06_sfnt_off0001798b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1798B 4808 bytes
SHA-256: ba320aff5491376dac12f82d317a8b59f8853002961fac32f7799c3bea7b7c6e

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