Malicious PDF — malware analysis report

Static analysis result for SHA-256 380f5bda23ae2002…

MALICIOUS

PDF

86.1 KB Created: 2021-09-07 08:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 340328e6a75004d20b80b116ccc0d3ac SHA-1: 3387761f20ccd1710f978731351d3cd064aa478e SHA-256: 380f5bda23ae2002d982058b9aabf29baa2c00bf34b7fc112f44ad3d949d6b1d
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071fd12443c0---jetatopunok.pdf In PDF document text
    • http://goldmustang.ru/files/files/21841551803.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4859e62bfd---13716421806.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f83eb6a8e---fupoveroberizulonez.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e76fa036bf3---tolanodivudexexomixo.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/zaxurifubazowebusej.pdfIn PDF document text
    • https://landbar.com/upload/files/nojapaser.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/e41b608eb5b0fab028e130b515c251c9/70043822123.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/51164965062.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083821203be9---72258308394.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc67abacc85---zunifawawigaj.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/2304203255.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfbaf27fed---11868791046.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092af37851b7---nexefofakebefisi.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/09509d8ec8b1c5a15ca0cd06615edbae/26908666171.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tq930ahjv862r95vjtq3o61bt2/52882521322.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/nexup.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/5a79da88473e93e79c658a6f7870f4b0/76133014308.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abaab14be60---51565319103.pdfIn PDF document text
    • http://foodchemsino.com/d/files/97011970481.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae467ee63ed---votugipakasune.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/493fd934987f09be3977ba23d4279cfd/97320023997.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ce1jpcsq4tekae7rtfaj4tan0i/85319337955.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=plantador+manual+usadoPDF 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_off0000e9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A7 10284 bytes
SHA-256: f5e9527ccb07bb31da46ac9fce91ceafd2022118f0b468ee334afceb2aa6ee2f
font_01_sfnt_off000100d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E2 19360 bytes
SHA-256: 52e3095127c4dbb84e3398febcf79234e7ebb95c80c0a9c614ca62f328371716

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