Malicious PDF — malware analysis report

Static analysis result for SHA-256 3447d0edbaed5c20…

MALICIOUS

PDF

87.2 KB Created: 2021-07-05 22:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 577c9c767f431653ba2426f01cffd124 SHA-1: e4b5a15a244b1cbe7abd2f668611a4074fe25c5e SHA-256: 3447d0edbaed5c2064b7c3fcf30205f36fabbfcec5e68c48c260d54ea0ef91b8
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous external URIs and link farm heuristics supports the classification as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://groupunsur1.com/contents//files/makamakaxovezo.pdf In PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160976201abfc7---filidifewadamipan.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160786dfe0e1f1---90768079470.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc9991360a---3985275748.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/4eh35t4b36qhbjkn6eq32epqnu/55500154123.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084433b2c056---zetetebodidebawevu.pdfIn PDF document text
    • http://billsky.ee/files/file/puwopowekob.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/zevudun.pdfIn PDF document text
    • http://apsons.eu/files/file/40287676623.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/73g29kkeakfolv6hl3kasmqviu/tamawiwusitagamudesoro.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/82855680065.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//rafumunuderezorolaxus.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/95869967225.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915bba72eb9---7282713047.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/gepitebilijazorubajaperod.pdfIn PDF document text
    • http://askort.pl/Upload/file/xevukojaxalidederosofesud.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/25c74c24144227de3990b409ab2e4535/kafaloz.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/l21aq55iuin659of9pp9j7o0j5/56162007097.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860a70e2d89---36115924417.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98573141691.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/waberanokaduruwosemikel.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/doxaj.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/q3c082j46d2rv67fn35ahoe1lu/vupudemejagadazozed.pdfIn PDF document text
    • https://hirurgija.me//files/74689815174.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/mejipukefokefopinena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=black+friday+table+saw+deals+2019PDF 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_off0000ef74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001078b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078B 11192 bytes
SHA-256: c67fc2ee59d12f624fc533967c7bd6f70cf6496a549865454047f601b8995a35
font_02_sfnt_off00012211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12211 17252 bytes
SHA-256: 6f74f70ea30efc10e7b32608521140f8f582f8e54f8016e967bf9604f258178e

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