Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad1186930a0613f…

MALICIOUS

PDF

93.0 KB Created: 2021-09-05 16:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9a8008b7fb74cbeffcb43969b958873b SHA-1: 476dbda55958c67acadc5bfe4d95cc2da08e0574 SHA-256: 9ad1186930a0613f57e4c08496471e537260bec0a05f641cf45faf45e9e966b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites, suggesting a phishing or redirection scheme. Although no scripts were extracted, the PDF structure and embedded URLs point towards a social engineering attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a517894d931---6950418514.pdf In PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/e37d18396ae45aac5ac9cbb312c66591/74239852320.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/bivulikolixoz.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769a90e3419---21544132606.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079224c2cf1e---gaweg.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/jatafigusu.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/73383224575.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/94450647241.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6ac16d0f8---zovatisezupadi.pdfIn PDF document text
    • http://millecolori.it/images/file/61628162187.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/gadinugejerejojaz.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/wedumumovomewakubo.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/8ba3018acf07cae766059f82bab598aa/68036688327.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b41575aa844---doturomenojen.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/veparegefuraniru.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/dakogomelekemufuw.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/9129761fa2b5ec56ef30a1fd1921f17f/fitolapof.pdfIn PDF document text
    • https://tavio.ru/files/file/ximidunoz.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160cba67eb241d---66173323869.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b393a384543---85243623262.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b242bf91003---webuzot.pdfIn PDF document text
    • https://airtelco.com/data/users/_/email/files/gemazemeguva.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/45643217306.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160abc8409a96a---juredorizut.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5edc35d56---rudisir.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/vovarumego.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/semovisubinizeza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=betablocker+pharmakologie+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_off0000fd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3D 20764 bytes
SHA-256: 2b192f86de5c8d94c2f35304b909b23fb4773d236223fafda662222ebebf69e5
font_01_sfnt_off00013370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13370 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B87 11080 bytes
SHA-256: cb02f58514dc9e288688310c82bd7df297c06b35352a910591adbf980477c583