Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab09f028b6cd4b1…

MALICIOUS

PDF

88.8 KB Created: 2021-08-18 23:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 014be4f44c1a74ac71718a702438a3aa SHA-1: 0352189f5cfcc0bd60abc3aa54f3fa53af88a13f SHA-256: dab09f028b6cd4b1dfb1cc8bdc3aa3bc7c63cf54966a2064f2ba9172ef2e78ec
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de2c660fbd---lumaborare.pdf In PDF document text
    • https://agronlogistics.com/userfiles/files/wegiluferedazogaguluziru.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lilulebedirejafi.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/41762ad7984690142e29777b07a4b2eb/62111131270.pdfIn PDF document text
    • http://congtyvima.com/images/Download/famuwivogudadefiwefafujuj.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents//files/fajifefemojuboxawagok.pdfIn PDF document text
    • http://meskerjager.nl/media/files/rawixogawujol.pdfIn PDF document text
    • https://hoongnau.com/upload/files/mulevanobekovivukudafaru.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/zexarefeki.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611421d667981---fonew.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/01626f76298b6107b30202e507003d05/volumuxovat.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/16632584387.pdfPDF link annotation
    • http://gardatrans.com/content/Files/gafugiborupexumukiped.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5573429c0---buweli.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082de6a23215---71544663270.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/tubite.pdfIn PDF document text
    • http://risme.vn/files/74626719315.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/fotefowiberizat.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/acd8edebf182941f545aba0e3d87ca5c/69770064829.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/nufixilurotutamak.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/tubetep.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00eeea50d---palogopuzef.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160acee1e58790---matusetosakemo.pdfIn PDF document text
    • http://kor-ra.ru/UserFiles/file/webilu.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/b1d0b78c14a512f828747bedf583d040/falewimuwiledixivakonak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+use+bissell+proheat+2x+12+max+powerPDF 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_off0000f8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D5 11004 bytes
SHA-256: adc6e33676e16704f1766b5ad8917769705de4e16b87d3e1730074aebb8585e9
font_01_sfnt_off00011256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11256 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A68 16264 bytes
SHA-256: 4fbcab90b9eed01419725e566747d0bbe91d021794c9f894a7c59f84ade147a8

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