Malicious PDF — malware analysis report

Static analysis result for SHA-256 6366c772faef6431…

MALICIOUS

PDF

85.6 KB Created: 2021-06-10 02:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e633c12dcb0d27c6722ca187305cc913 SHA-1: 7fdd4c4a9b63dc0ab03b5de2fe00ce04e8bb64d5 SHA-256: 6366c772faef64311625c90865ce9a49b19567f55000f3ef2c8821f17c61a7d2
196 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which point to compromised WordPress installations. The document body, though heavily obfuscated, suggests a lure related to downloading a movie, which is a common tactic for phishing and malware distribution. The presence of multiple external links and a high ML classifier score indicate malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://huntic.ru/uplcv?utm_term=chhota+bheem+and+the+throne+of+bali+full+movie+download+in+telugu
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee13076baf---9191987907.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076312106d5a---wovonalajusid.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160acb1edde1e7---niwaredopidozukunolifew.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/93110940911.pdf
    • http://forter.vn/hinhanh/file/nolak.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f57a3e079---katamufisefujibosa.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e136f5bce6---bixutunazolewozeziso.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160c03a1ca3f29---lixuzivozimiwuzusobove.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/fc32a42bd1efab0064aa39334013ea85/voxad.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/le0124qgrtaa9bhr4i7kkj1je7/90970489555.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/r5bb8blpm70lpaaauhcrgg0vl0/nisurikilov.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/qvoft2mi5u4m49thojdvhefhk2/35210203196.pdf
    • http://campbellelectronics.com/uploads/setokew.pdf
    • http://ipublicity.cz/data/file/12997163307.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc28a25b83---35927935153.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/fd50a01f4b4f4294e69ab90b1ea7c9b7/25445412533.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/0c5a7c8efca7c7950d40958bf0ec5187/64882964631.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee66.bin
1b0a854dcb296071e3dc8493a89a3e7cc612c29dda50dd925b67cfc3552edd32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE66 5340 bytes
font_01_sfnt_off00010081.bin
888e6b3642c8b25a0fbde4dc4a775006817bdb77cd5e49ccefed5c08f7448b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10081 10596 bytes
font_02_sfnt_off00012511.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12511 16164 bytes
font_03_sfnt_off00013a2a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2A 4324 bytes

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