Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ddf6ac3e5687d4…

MALICIOUS

PDF

80.2 KB Created: 2021-09-06 10:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 96a944c01eefdd7471bb893fec24c1af SHA-1: f7a97cabe1b9e382566c74c4b1296a6433b0152b SHA-256: 29ddf6ac3e5687d4985570453bda3241d70d63c0b64329b01cb28b6315ada7e0
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised or disposable domains, suggesting a link farm designed to lure users to malicious content. Heuristics indicate a link farm on disposable hosting and compromised CMS uploads, and ClamAV detected it as a phishing trojan. No scripts were extracted, but the primary attack pattern involves directing users to external, untrusted URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a5204097c---75400812813.pdf In PDF document text
    • https://dailyhondaotomientay.com/upload/files/1254449834.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/8c2f17297b3dd72427fb0e44ca7edab2/31078463529.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a986acf2ea8---bulivaxemawugaponanazojox.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f2002de3b---sevomasesijotosorasun.pdfIn PDF document text
    • http://secretinvitation.net/images/files/83882467207.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3sair29rbqmmc5mnsc83hluju7/70612124865.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/jiwawupeselemalakedom.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/88815782745.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16105596470188---44216057714.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/nanipuxenizupitix.pdfIn PDF document text
    • https://wavemed.it/wp-content/plugins/super-forms/uploads/php/files/9d9d04da20dd53260f923cb10a8a0dcb/jotezapibo.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612922ac685ff---danevegepelazufafi.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/13581854261.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/56521516276.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/lipilutawipuzixikuful.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/32335656468.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/86236320401.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/97237937684.pdfIn PDF document text
    • http://ceccargiurgiu.ro/userfiles/file/56220635416.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a50c5708ace---4119924442.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/15335849503.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/lir0tb8phsu9s5dm8cfqpinkc8/48907853780.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/botoloxepuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=solutions+class+12+chemistry+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_off0000d568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD568 11348 bytes
SHA-256: 2d6cccb300d5d3e9d6c216e976f4c3881b2bed10485695940712f8d7cd500496
font_01_sfnt_off0000efff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFF 16600 bytes
SHA-256: 093b2799b96f161d2c20bcc90dee73f51c8648f84c92422438017ecca9dce6ee
font_02_sfnt_off00011a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1