Malicious PDF — malware analysis report

Static analysis result for SHA-256 09abd75ebd4553b5…

MALICIOUS

PDF

74.5 KB Created: 2021-05-10 00:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 02737c2b1a23598c1f06610deb036758 SHA-1: 227dbb7e27f3a785e621c2cf792692cc8180a70f SHA-256: 09abd75ebd4553b540a9a65a67dedd547ddfcdedb13f8c2d435848527513d910
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The document body is heavily obfuscated and contains metadata that does not align with typical user-facing content, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f615ed3940---74165962456.pdf In PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4aa036347b5cb63c1b4ca656ed4eac73/sovasadimobosenajaxar.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/ruoc0p6gnei6mjq75e5pjnm9pu/91164913582.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba8b92cd74---bedelefesamuximufeka.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/a98415d6662b18ddee4a1ef828198a3a/96896596014.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872c3cbf206---20199775358.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0ae9ca36b---28790156819.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088971033c2a---61012456269.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/0102ab3749ff82da1b6eaee017941ff4/papuwovasu.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/bee7411e9b6c6b19de9adaf98d27c5b5/rilorakumixoxeda.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/7kjtsf0nh07g9e6t5vu1ub7cbs/pejotosujowoxu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094056e04afb---wekosajodikugawi.pdfIn PDF document text
    • https://medtek.vn/storage/file/migurananevevudaxeduj.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/4d8d60vskfbbdj22vadem2tdh5/62214213985.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=asura%2527+s+wrath+ps3+gamePDF 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://scripts.sil.org/OFLIn 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_off0000d2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EB 5480 bytes
SHA-256: a2ab019479888dfb07e6ca5d65d5d9b6f96dc27fad0efa7ae7abde8048ff6a5b
font_01_sfnt_off0000e581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 10060 bytes
SHA-256: 49c5cf6d31b954d35d11b642026708bd280216aed0155ef5b47064701bd6cf9c
font_02_sfnt_off00010812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10812 16120 bytes
SHA-256: 2a726e4d8e078a4a4a6a0bed67b139344cab8167eb027720faf42c08020076b2

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