Malicious PDF — malware analysis report

Static analysis result for SHA-256 737d62e855933e1d…

MALICIOUS

PDF

74.6 KB Created: 2021-06-20 03:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 28a588ddd71ca4fc980324ffec3ad756 SHA-1: 871076db0d933d95b81e266dcff0a79e38c4212b SHA-256: 737d62e855933e1d37940f830e285c16ae02fe2f15aa31cdd41210f75006ca93
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which point to other PDF files hosted on compromised websites. The presence of a visual download button and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading further malicious content. The document's content appears to be a lure related to 'moody presets for lightroom mobile free download dng'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/3ac4d6a5eec0a27e7aeceb383dbc0d30/4945277866.pdf In PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/86663233182.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f35dd22d1d---99368509213.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/95189571309.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/zivak.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/58524118569.pdfIn PDF document text
    • https://invest.pl/userfiles/file/xesetuwovetaborow.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210527164420178.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b55999e9354---fenowugosaworapupisa.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079dcd5119c7---gibored.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/fewolokikopiwa.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094ce4c44422---lalebojuxalewoja.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/75eea22b07e3fd8055ee0bd20310521e/6203554201.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/jetajusedujozum.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/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=moody+presets+for+lightroom+mobile+free+download+dngPDF 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18B 5792 bytes
SHA-256: e282ae79c897e4cdb59fde4f307b9743fbea2fe4f26c541df9a544256bf0e60d
font_01_sfnt_off0000f537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF537 11156 bytes
SHA-256: c8be6734cc53522dcab1f21f98826c8fcd1b39d507a982a04e8c7ae63cc48f27

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