Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c69332ce40ff65…

MALICIOUS

PDF

84.9 KB Created: 2021-09-05 07:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 398fb0a32dfd3741ce078d8a1970cf27 SHA-1: 667fb63ac19b9fc33b821d53995f48fc93585efc SHA-256: 18c69332ce40ff65ebeee13bd8b521a4e40617c8e89658bfa1d3e0b68fe030c2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to mimic an invoice or payment request. Although no scripts were explicitly extracted, the presence of PDF-specific heuristics and numerous suspicious URLs points towards a malicious intent to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pokewaveanaheim.com/uploads/files/78030812136.pdf In PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160fe88d090b34---kajagefefupuk.pdfPDF link annotation
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1612c718ba3c25---nezolizijifisuvoje.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607eab609fad5---nudinotumagiliwerilomapoj.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/911f0231633d58d9144313c73db23149/sajazakuboge.pdfIn PDF document text
    • http://huonglonghotel.com/uploads/image/files/26131846676.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/pixenen.pdfIn PDF document text
    • https://matharu.ae/userfiles/file/14405473674.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/6661003253.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/46551700015.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/bowutoz.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/oidrhsvj3sh8k9jefjl7rr7gf7/lunafitawujujut.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/91559572690.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/fokapovojifesokebu.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/14855496849.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/rovexowubotekezuratavivar.pdfIn PDF document text
    • http://monroehighbeachreunion.com/clients/8/88/88bd109b8fc96949fe6caf7698e88fda/File/22028668235.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/15344889491.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/32631831567.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/porulipo.pdfIn PDF document text
    • http://adbrf.com/files/fckeditor/file/208265938360fad39f3ebb5.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/guxolegudosumev.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/1d700eeccb15875dd2629f3f3e45db3d/lopufodaxesubu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=aa+pet+insurance+claim+form+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://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_off0000e5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEE 17848 bytes
SHA-256: da77100ac837bd39e2f2851f44aeba96fecd4b06b53bd1a07cd02854a8273b0e
font_02_sfnt_off00012c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9B 10864 bytes
SHA-256: a7aed34be7b47402095e5f26f8b69a361acbc9e8317b7a565fefbdd4e6460e2d

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