Malicious PDF — malware analysis report

Static analysis result for SHA-256 7069af6b2f541f6f…

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 20:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1b02f933f8f0315bb7e3d6b0a7758a47 SHA-1: ca9189ef379566f69c85e6a3f645a10e5480c499 SHA-256: 7069af6b2f541f6fed6fd5ef6dac68c4257bda8e3aa80860605083054a3f901c
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 pointing to various websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to create a link farm for SEO poisoning or to distribute malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/d07689a43760cc5d8b86c221e1295434/fofamajifoguvosazesigul.pdf In PDF document text
    • http://aapltd.net/userfiles/file/53735602516.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/tegigavewepefavo.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/42026726552.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/goguwowoxotijanigolu.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e82a7fbda75---koguvijarokezag.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/77229181266.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/85708748fe917d2953f76230f6af9a9d/49074255375.pdfIn PDF document text
    • http://candientushinko.com/images/file/8580362458.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161125ee1760ee---62407630302.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/34992585918.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/7a4847de131f5d0c0f45cc8e909f54fd/sefoguwilogewibotezil.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbe649a33d---28335859275.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/150308533485.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/95602434937.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/b90f55efffb1524a4f4eecde58e15e37/48482015161.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/95291315276.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/60955991735.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/32565140972.pdfIn PDF document text
    • https://termoformat.md/img/files/nurotuwilovalobikuzujex.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/nojujuxetetitusojexikan.pdfIn PDF document text
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/42551857198.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ce914b78bc7095f0a49618558a2427f0/mukoxeduzifinuvatosexa.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5099e7a47---bexud.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/3527767893.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ethiopian+air+preliminary+report+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_off0000da93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA93 18268 bytes
SHA-256: 50df1038139ebd71cecd96a1d7613c3eecfa186c7ff187bcd572d26b62494411
font_01_sfnt_off00010a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A74 10692 bytes
SHA-256: fbb7726bf4cacc3fbf4b980300e7ed5af4b1480c00f5b04694fc1ebd7c8df20f
font_02_sfnt_off000122c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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