Malicious PDF — malware analysis report

Static analysis result for SHA-256 120d1819717b7ca5…

MALICIOUS

PDF

99.9 KB Created: 2021-07-26 03:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5b7be15d513856a12bf506fb21d3105 SHA-1: b44ec68b139609d15a89cb6c1189c8199ab74078 SHA-256: 120d1819717b7ca5b0145f075f59a539d59f868716290acc57f2166c1b688c2c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. The embedded JavaScript may be used to further obfuscate the malicious activity or redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9926dd4618---33363371029.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afc1e92ddb1---lifes.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/fe0b1cedff3ce689c84e61797bc7114d/46032857209.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79708af00---zipanaloneselepak.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f55f250d41---wawabawiduta.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/6d14a22bb1f97b336b9aa1294c9911c4/20952903495.pdf
    • http://vswet.ru/f/11881854426.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/d8ec0739db64ff7d5754f100ebef053f/23180036286.pdf
    • http://taketty.xyz/js/ckfinder/userfiles/files/dakidaranukezotobidojije.pdf
    • http://waterreducer.cn/d/files/95505224415.pdf
    • http://andlupa.com/userfiles/file/kuvudigufazesuruwuleve.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0eccf43339---wovamelurenofivokesama.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2cb2733ee2---pakal.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/7finig18l7cnncml9guiujlob7/43500854373.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608837b8970d5---limafetuwitisi.pdf
    • https://nazragame.com/calisma2/files/uploads/53486554429.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160913481910c7---wasot.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/cb368dd9aa3466e4fd897944c9a013c4/45851611630.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/melabomilewawakenazuva.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b630ed53fe8---wivuxulagovebakov.pdf
    • http://www.hydro-tg.pro/upload/file/18225721872.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d81a8dab0a5---87728159174.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/0111d18cecc1d27d403816aa3175cc66/jasepulagafepawunof.pdf
    • http://sammyurias.com/userfiles/files/66980717313.pdf
    • http://phantasos.org/userfiles/file/76402846682.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/d52cb05edc09e68161e958f4cf797375/toxopawafikit.pdf
    • http://gidaero.com/upload/fckeditor/file/26635676609.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+make+a+easy+xp+farm+in+minecraft+1.16+bedrock
    • 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_off000120e2.bin
0d4fbfc0927dffc877a7ee028d8901c7bc59d55f04ef57d13b6d0c164b33a671		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120E2 17064 bytes
font_01_sfnt_off00014daf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAF 16792 bytes
font_02_sfnt_off000165c6.bin
42d94daee32b830e2156bec7c921585f21cfc47b0249bc2c47fbf152a2c9c285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x165C6 11548 bytes

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