Malicious PDF — malware analysis report

Static analysis result for SHA-256 019c2c6c488fe751…

MALICIOUS

PDF

88.8 KB Created: 2021-06-28 01:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df718a66d98f9c5e3b5e12c602112600 SHA-1: eeff710231247dd0460c13578f63cefb4b7f87f8 SHA-256: 019c2c6c488fe751e19fbda3ccc0e5be272ad1afef6ed61b780d42885bc5fc8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various PDF files hosted on compromised websites, suggesting a phishing or malware distribution attempt. The presence of a 'coin master unlimited spins apk download' URL in the feedproxy suggests a lure for potentially unwanted applications or scams. ClamAV detection and ML classification further indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://paklya.su/design/img/upload/file/5480847479.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa908380bc---61832018927.pdf
    • http://asbufestival.com/uploads/FCK_files/file/wutuxokafa.pdf
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782d31aa3d1---54359655163.pdf
    • http://files.ibiza-ferien.de/file/fobagelokepagumijopuzax.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d51b90d3e35---xedivazesutafukifob.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788bda5ee51---zotekes.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/poevoiobvlh0gl99p37ohrlsfj/47145862861.pdf
    • https://tavio.ru/files/file/dudorudilebepizoleno.pdf
    • https://birotex.rs/images/files/vimikufunaromozaka.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/3d3a6a06bd3f1be007a4f967a4ebd9b4/xiwevajukiz.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5de04c5be1---vamawidakiluzivi.pdf
    • http://romanakladatelstvi.cz/userfiles/file/19142099228.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c325df81b41---modunofudaxejomuxek.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/636955a85836b493d29e4cc22601dcb0/mawito.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160881ec275491---83079288950.pdf
    • http://lnaixi.com/userfiles/file/20210627001636_1857296232.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072214dd8913---46072381355.pdf
    • http://anhopphat.com/uploads/files/japirekivupugabika.pdf
    • http://www.anjhimayath.com/upload/file/34332612075.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085d04655c1f---73733748014.pdf
    • http://northcity.rs/slike/files/38349736742.pdf
    • http://unseretochter.ch/images/file/torutamatajejil.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c34bc76a9---zotisupuse.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=coin+master+unlimited+spins+apk+download
    • 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_off0000eb3c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 16792 bytes
font_01_sfnt_off0001034e.bin
1eab9cb2f2d316ef5ded15d74b6a4054aaa0e472196f6e3fcb445631f58fe853
pdf-font-stream PDF embedded font (sfnt) at offset 0x1034E 28224 bytes
font_02_sfnt_off00013ca9.bin
99a209e9df1920ed99423065f2df1d038e9dfeef6904c7050d340e3ebe0b22c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA9 10864 bytes