Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8468889cd2e699…

MALICIOUS

PDF

78.1 KB Created: 2021-08-01 07:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 623b3d61f22abd1f46eb84adf5377093 SHA-1: 29c62686f2e504ebd1cde8598643e43cbd9c8daf SHA-256: 3e8468889cd2e699e7e779c88234e71c8c0545fb5c52a69f193011bc0a7fa357
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains a large number of links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of numerous unknown URLs suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://lg-palette.com/upload/files/joruxedeb.pdf In PDF document text
    • http://ferramentabelleggia.it/public/file/jumixenepome.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/906lduektbsoc3h23nkoepk296/62901865995.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/baziwofiromimonoditubosuz.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/salovope.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/4mjciik68vagf4iepn62s8odmf/60243863245.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/tudasafaluzagepowelorito.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/77015946265.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/51786635408.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/8987827059.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/0fe31be9cdfc702cd62c44d88b91ab63/nobudabiwigigimoge.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/pexesafogovozik.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/loboramenewiparamibupo.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/ragubesurawug.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/14981549311.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/36478714831.pdfIn PDF document text
    • https://kultmotor.hu/images/files/24575572151.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/binajumekapanim.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/bijerakimibos.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160db973da62b7---vekavalirobajenuzawuveda.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1eec359114---vifenunaginunigori.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/bafopopusizigeneget.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/3768b6e1c6742ad3164e05fc02750030/jamewilegobidaz.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/rejuwuxaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=bodyguard+salman+khan+full+movie+subtitle+indonesiaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001108d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1108D 16836 bytes
SHA-256: 200686e5cae5a04270f0e543ac38f0a4209c9c90ee8b5ee67339f7c07bdbcddb
font_00_sfnt_off0000b4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB5 16236 bytes
SHA-256: a1e8eca7a5cfc1b842ae41eca28b5fc44cbfad453f4bb2b3337443168312727b
font_02_sfnt_off0000f629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF629 11368 bytes
SHA-256: 127bc248cc9cd917e3a3a130dc9fef79fe88ef184885a04f01b1fccd355a3dd2

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