Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e611a317666ba7…

MALICIOUS

PDF

76.9 KB Created: 2021-06-19 23:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ee131ca2d470bc51e4a112c286f1b990 SHA-1: 408a95fd958dc5d962c17d96a0e81be5dd09b098 SHA-256: 72e611a317666ba7d714c5b59c3626ca2fff3fb8d6af197b741761fc44cf9b29
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised or disposable domains, which are likely part of a link farm designed to distribute malware. The document body, though heavily obfuscated, contains references to "free fire mod apk obb unlimited diamonds", suggesting a lure for potentially illicit software downloads. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malware distribution attempt.

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 https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/c81e3f7d906eecbdcddf7d98092b6b78/basifenidudelad.pdf In PDF document text
    • https://hzautomatisering.nl/userfiles/file/fokapovojifesokebu.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/zolofojusuwijivi.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9adaad527---25077437875.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16086cae4d3769---93069536874.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160877b446fc86---54731724408.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085024b66fec---73199160902.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/933d036f3b83ccd70b6c22a0851a7972/39346571859.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/pajupuridopemega.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080f69eaaa39---86891986914.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160875e8202fca---doralulezebegos.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/34487829533.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/85624336356.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d84f05f312---vafumuresu.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29bebc0143---26375915984.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6e864c70be6a1a30f707044f2f5d5bd7/26759648333.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/92283a13a9c2fdbfdcf15b28dd0e8b05/mefemeruzoj.pdfIn PDF document text
    • http://recrute.fr/files/files/nubut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=free+fire+mod+apk+obb+unlimited+diamondsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E9 5228 bytes
SHA-256: f3779da054b844444c6fb314435313e6e7091ba97dda18eaf2e21e98a24ec4c2
font_01_sfnt_off0000e994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE994 21968 bytes
SHA-256: c3209cb95ec28b739cfb64eaee71e39b798a5d2eef2f9dc4e7739d5aa6a2afad
font_02_sfnt_off0001188a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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