Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c65d60a066ee469…

MALICIOUS

PDF

68.5 KB Created: 2021-05-25 11:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe3134b43276546264fa24b7d73962c0 SHA-1: a4e430934cb761c5b0eb9919316221d6725274b3 SHA-256: 7c65d60a066ee469c4e20aadbde6d0d4e915da619c05990b61b4cf61f9a90dc3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links pointing to compromised WordPress sites, likely serving as a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703547dfc34---besovosopivabodiju.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3e44228d7---94763782452.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf902e88b9---15972630385.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bea09e66c0---safasuworo.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/mufidekivaful.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/c72b603f4ce53e24785b60d2c00d2b2f/kurexiv.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16072be5f3e1ec---solipifak.pdf
    • http://asianmosaicnyc.com/userfiles/file/24809949658.pdf
    • http://zhengfutz.com/v15/Upload/file/202152222363237.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/2decaff73d80e4c5677296a91f34d9ea/41885705260.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0e1529dce---xizipitedanekesowe.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/6ib4275p3903g355cuvkjh9uld/sigafuzewefubalovej.pdf
    • http://dzbnf.com/upload/file/%5C/zozigi.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/a40be8830421617601ba876fa41ccc44/tavoxawuzafu.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1d314e08e---58712807727.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160725b1ce2266---73689882076.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=dp+animation+maker+full+version
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d128.bin
a66c7dbab368a7341a77263faf76c3c73ea231505df5e52288b8986e311ee490		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD128 5168 bytes
font_01_sfnt_off0000e2bc.bin
f006f44612cb2c7f88f7831188bb41bb47fe63b8bba985a12b6c3a0f9239a1aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BC 10128 bytes

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