Malicious PDF — malware analysis report

Static analysis result for SHA-256 29dc3f5b2d4dd15b…

MALICIOUS

PDF

78.6 KB Created: 2021-09-01 03:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a59f0631b2e4d1709e74c5dfc3f02001 SHA-1: 8287b3f1e81524d65766980adcfc3700d54299f0 SHA-256: 29dc3f5b2d4dd15bc99330723465466cae0c6ae96aac6ddfb849554c6f0fb30d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The 'utm_term' parameter in one URL suggests a potential phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095aaf2e0f0d---pagekinapikuvu.pdf In PDF document text
    • http://www.lnk-creation.fr/upload/file/46317618530.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/dbe1195327813fc7cb5116df42a2365e/59671910136.pdfIn PDF document text
    • https://renetravel.ro/images/files/54336092154.pdfIn PDF document text
    • https://aildf.in/userfiles/file/27122575263.pdfIn PDF document text
    • http://cohensevents.com/clients/74638/File/54023807982.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a2184e4487c---32162974081.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/71696537025.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/60505381877.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/virajogo.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607aab178584a---kosimodosamoz.pdfIn PDF document text
    • http://bigredclassof1960.com/clients/879476/File/riduvopamatenevevuwiw.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/zurimam.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/e41b428d77bc95795c6abefdda947336/49127908514.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/70264109459.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/c92dbfb656847cfc4d43610da5dba498/9319427077.pdfIn PDF document text
    • http://coumert.com/images/file/42629036616.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210818_97F6FFB85FB59526.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/tovozirumiz.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/fimodiwadixi.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/7220553437.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/noturiwaluvaju.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/74569984210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=walk+in+closet+meaningPDF 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_off0000d010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD010 10556 bytes
SHA-256: 8dee00de66360aca01813445937ee675761d3ac28890d021766465986a211f66
font_01_sfnt_off0000e827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 17260 bytes
SHA-256: 6f44c2d2fb85126e78bb12d16959a246a25f4a1683631c8e5d2538bb62d03f90
font_02_sfnt_off000114f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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