Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7aca30114dd4d48…

MALICIOUS

PDF

87.3 KB Created: 2021-06-27 16:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e73718944ed925c8bce794e949b4b6f2 SHA-1: c6d79da7b669f175b91f7cacc8ce78c0daa0ecf6 SHA-256: c7aca30114dd4d48248a915630c6dbfddc63b9b10f8eb9bc5a7cfe360b714324
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 that point to potentially compromised websites or disposable hosting, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of external URIs and link farm heuristics strongly suggests a malicious intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://drafthe.ru/uplcv?utm_term=tubidy+mp3+mp4+download+free+music
    • http://anthonyvienna.com/sites/default/files/file/63332574288.pdf
    • https://somogyplusz.hu/files/serolatubemerubumabiraka.pdf
    • http://aliceinformaticasrl.com/user/pages/81960511573.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/7d4e5937e231cee625583c0ec613f72d/49521128777.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/5n52voo6ahvbgtb5k2jdl1le32/muwowekikanozora.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076ae37302c3---49784555124.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/523069645d3c696cb86fac1b9634657c/welawewurexepusozovazog.pdf
    • http://retroldn.com/userfiles/file/86695118311.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c8eb69d1f---24407525738.pdf
    • http://wagnerpc.com/userfiles/files/26727667858.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd9e80bf88c---xajesufokuwuwudiwevuzova.pdf
    • http://www.tobywells.org/media/fckdir/file/16462946478.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/dcd2458b344649c460cc4cc43f582f58/soxakevi.pdf
    • http://africa-emergence2019.com/userfiles/file/xeduxak.pdf
    • http://atomleasing.ru/media/File/11734537340.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ce66ad50f---nasobe.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec8df8c632---xuvupovekunuge.pdf
    • https://bhsbeacon.com/FCKeditor/file/wakodufefi.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724a285d8d0---91646247518.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c69026a56---66264122810.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb8fa29ddf---bamut.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/99537f7433f44399d2a4ace93ce748ff/61953287080.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/k3jlajqmackg1s7drg5q5qe3s6/wamaxif.pdf
    • 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_off0000ee69.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE69 16792 bytes
font_01_sfnt_off0001067b.bin
c5b8b2bfc240a5446b8cec88e5a50fcf8d1147dda68f7dc0a93a00c1fba8feb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 17984 bytes
font_02_sfnt_off00013569.bin
9231001c0d9f9120eedf455f0880199c4e87463fdfd226dd6a8038f25fd5697b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13569 11336 bytes