Malicious PDF — malware analysis report

Static analysis result for SHA-256 054f56292e06ade9…

MALICIOUS

PDF

74.8 KB Created: 2021-06-12 08:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cab06f4a7bb68ae69088019dcd6406b3 SHA-1: 26874e40109a4a178ca6ebf53907900709876919 SHA-256: 054f56292e06ade987112fe2d3c2dae4b1275a4ee31f380c8749f30b3ecba255
204 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, many of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The document body and heuristics indicate a lure for downloading cracked software, and the presence of a password-protected archive lure suggests an attempt to bypass security controls. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=download+winrar+full+crack+32+bit PDF link annotation
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/r35n6dhv44u0mv8nueptghicqn/27855900521.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/fobitizepese.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/b8fb0726f81f357ae4b2dba2ce1d0bf7/17027028161.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8f3501ca6---45749429413.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ir3u3fs571723p1pss1mpkauu3/sotudasozo.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40017c1b03---xepej.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/44739055448.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/u6873tp7gccl7u1lii9497mov6/62194705207.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/39751838750.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16093b03e12ddc---98221574708.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/691e7b44d204ecdda90bc0b42fdfad63/rudowaxujumifiviliwon.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/j81nio81ooqp2j01524n2gg5l1/51697381288.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/7542b38f4c6b50f2b78dde612285f38c/telulisawotutetewa.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/1761963206.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/xuvusadefadivu.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/xiwozomoronofipudipore.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/46238205080.pdfIn PDF document text
    • https://webmenuplus.com/images/file/sumulugaza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 5428 bytes
SHA-256: 1be04096670e331dc58b5017f17ddae5b8c24be7f374e2ba6f6a525d122df940
font_01_sfnt_off0000faaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 10396 bytes
SHA-256: 51c122883e031a598e8a081519b47e7141488acf6992fab475d65756fffa1fd0

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