Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27056abbeacbd55…

MALICIOUS

PDF

78.7 KB Created: 2021-07-02 07:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da29af78c9be3898f35eca218f84c089 SHA-1: 7bc414225309b5c46de7da628074a5f26f02db4b SHA-256: c27056abbeacbd55cdb51c5502082af8afe9b1f1d83db3bc2f45e8be53c1d9d2
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to numerous external URLs, many hosted on compromised or disposable domains. The presence of multiple PDF link farm indicators suggests an attempt to obscure the ultimate malicious destination or to maximize reach through various compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://megat.pl/uploaded/fck_files/file/miwamonebagabu.pdf
    • http://etcad.net/np/upfile/file/kakaporedavugalinefetula.pdf
    • http://domainecomps.com/documents/files/83691025787.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/ca78c368f6e9b22039face3f2a5b5f0b/62081407286.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160893194509f2---41124601354.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085acb252824---vasuwotemixumegazukadigen.pdf
    • https://majorsagilekvaros.hu/uploads/file/35254687814.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608dba28e5b8a---53248691280.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/471e044854d596490d7597b9b07fa336/pogejixis.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcaed86ba8---difijasojupunowusitiga.pdf
    • https://o-dance.com/upload/files/88771643426.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/ce886f0729069f2b87726bd8900d8f73/wojizaruso.pdf
    • https://vydavatelstvoklett.sk/userfiles/file/zofasajetisabemejufuboge.pdf
    • http://cuspsurgeons.com/userfiles/file/gutuwopewukepavowapalonud.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/4b8c1df175b60d9971eb87d462d638ef/88877618934.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076eef391cd6---31454761644.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/v76ntaqcc37erelnt7na4klba3/gasevagu.pdf
    • https://bamfieldrental.com/userfiles/file/72760166782.pdf
    • https://birsamundapark.in/userfiles/files/28274271106.pdf
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/69670772932.pdf
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/a6dc3987ba3c3de99fa057fba3ddb33c/lubipatubirusizobuj.pdf
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607676776df2c---15617500513.pdf
    • https://aspaeng.com/files/image/files/47930269826.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=phineas+and+ferb+izzy%27s+got+the+frizzies
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d01b.bin
bd6300958019dad6470acd3bebaa775674f47cac0bc4bf21b36bf7ebd18ae61d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD01B 16908 bytes
font_01_sfnt_off0000fc13.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 16792 bytes
font_02_sfnt_off0001142a.bin
1c3a9416e7d5eebbe7ea5a676e4ff4ac7943b7fcdb0a8fdb1ed2730ab94e404e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1142A 10936 bytes