Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c60a2bd3c388c56…

MALICIOUS

PDF

103.2 KB Created: 2021-09-07 09:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 015dfadcf15a4c7142395e2a6602afb6 SHA-1: 307454405f920a02a9b9e38a235dd98abc217c10 SHA-256: 0c60a2bd3c388c56825abd07b423e7288d4dbdf5c9cf613cd19965bab12f2cca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to redirect users to malicious content. The PDF structure and embedded links suggest an attempt to exploit users through deceptive redirection, potentially leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://abwcrainhwy.com/uploads/files/36488497153.pdf In PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/c92f4037128c9883dd7aab2ca95aef10/mezuzibosiduwegoweruf.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4d7ab5137---dukutuguzijame.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/35505396386.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/79582732330.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/8d40d737a6b7aa015019e3a5269cf04f/rolubebifa.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acbb67bc892---mezejejusap.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/ffc39163abbd8d986c8ef13351b87c59/devevulowomumunikebifazo.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/aa8ab50586245403280532aa2efe6022/lofibepileba.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/f6c29f3b0cffca56aca7c62b5297ae7d/jopuvogijomes.pdfIn PDF document text
    • http://gchs1969.com/clients/867877/File/rusufawumukorafisimup.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/52075998733.pdfIn PDF document text
    • https://windsbs.biz/files/file/dikikevobonibuwesofo.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/15851311697.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/76a859df93fd182c0c617c78d56b05b1/38552510370.pdfIn PDF document text
    • http://surtek.biz/image/files/20150119_013044.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/vegizesojaworeno.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/tomm3mb27do0ks5smeol664bn2/sakutenixumefudiz.pdfIn PDF document text
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/12604402730.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/nidazutu.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b81f7b9aa2---46502384253.pdfIn PDF document text
    • https://onecre.com/images/content/files/51584483036.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=bell+sleeve+pattern+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_off0001277b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277B 10400 bytes
SHA-256: 8f29d8e4082a4facb4ee9cdebc35f257e13c2522b783b174f51f39d8942cb763
font_01_sfnt_off00013f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3D 21220 bytes
SHA-256: 93d37613b2672a248a24e530c3e1d4e9f34c2d5e0f0364dbd131cbf4c88d5a14
font_02_sfnt_off00017747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17747 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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