Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4fa327514a0696…

MALICIOUS

PDF

103.6 KB Created: 2021-09-04 19:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6127586682cca0e3d7e6a4dc638972f6 SHA-1: 8456b1b3c183f70aad28474c51a8e0c6f9ceaa2a SHA-256: 3e4fa327514a069685f81462d8c74b144a91a8b3af6215eb50c85b850c607999
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The embedded URLs are likely used to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b2e1f166b3---jajigejubimab.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607557a81fa88---xixuvukujazinudivamu.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160f34789f3383---dekavepipurotoloka.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/41368369529.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43c5aef4cd---gukerumisotos.pdfIn PDF document text
    • http://northjerseyseniormenssoftballleague.com/clients/2/22/22e10641a135963e7b476298ec508c3c/File/5187251454.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/96d29bbba98c0dd3c1e7bd0e9a724f6a/44888561593.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/543690e9ec0b31525332172774802413/tusatumugurebosigazexozis.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/1560701748.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/fufumasanena.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a719faac1f1---62705303050.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608da7168db07---37398915709.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/wizetanijogadupokisimode.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/a0c2d51650351f038f680d8e2539062a/zikesuraboraj.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c04200f2141---gipatotonaresabaraluf.pdfIn PDF document text
    • http://www.southpointinstitutehowrah.com/admin/uploads/file/45644032964.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/89829304595.pdfIn PDF document text
    • http://uzks.hr/upload/datoteke/razesupezirugovisuwolafa.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/fefilikagujekegejuzola.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/l73u70960jdauicl0iqe36tdu4/55971118064.pdfIn PDF document text
    • https://istanajp2.com/contents//files/pegokakewojal.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdef704fdf---668839632.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c8247fe67---38678477813.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/20048881202.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=simbolismo+literatura+pdfPDF 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_off000129e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E5 20752 bytes
SHA-256: 7b62d49082e3b5e49ae40dc2d1daf8bc2f49707bcce8897d1e4bb5e13bdea29a
font_01_sfnt_off00015e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001766e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1766E 10868 bytes
SHA-256: 8066cc5c7f68ae7ebb6d3e6972c2a7aaa2a98ea64da30e2b03e5990ffbdecc05

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