Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e01f7093ba3a45…

MALICIOUS

PDF

89.5 KB Created: 2021-07-17 23:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 184e715b93692407f3c5f5cc97c86bff SHA-1: 9a63016d946e0b339b97c0d8a5cdd91026fb3a10 SHA-256: 63e01f7093ba3a45ec4544989aff610d8814a37423e7be4f125cbf6a043e76c6
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, indicating a likely phishing or malware distribution scheme. The presence of external URIs and link farms on potentially compromised CMS uploads suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/425bfd4799da9b573b1766a95cf60b4c/81780847387.pdf In PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/e9867eef064589375ea90bfb5bb48b7c/roxarono.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/peluzonunejixinuj.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/bejori.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/70979923343.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/55629759076.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ecc87e1a---jizej.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/e899b959b581638c763a896a3b125fd2/33904681381.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/i94l5r931ndg89jtkecbf1sj9u/vamimofukadesu.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607195387f559---xivoketuvutuletatile.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/82586057355.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/40250289850.pdfIn PDF document text
    • http://zgic.ru/!upload/files/zojakadaworonene.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/7b3a088c1c918c8dada3cceeaf155bdd/95298099839.pdfIn PDF document text
    • http://pk.mo/userfiles/file/45733964570.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608215be9494f---bibapep.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/niponosikezigusije.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/093bd7959bb91c6314eb4479e93c6bc7/99609714492.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096cae69f913---90721688974.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210510023638_2067845471.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/bunabojitagijowoj.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/7461844413.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6f19bad6d---30617349717.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/renokokitadulogines.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/86822584078.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/65016098735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=new+indian+punjabi+comedy+moviesPDF 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_off0000f6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BB 18328 bytes
SHA-256: d43e30a3594e2551b462a5e286c2b9ee7406cf77090cd3c5aab1ea39fdf439a0
font_01_sfnt_off00012728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12728 11044 bytes
SHA-256: 5471a7a4a73f0853e1f137439b3e58f228aa02b847b31e51c2bba20b03e63a8a
font_02_sfnt_off000140a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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