Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c0e126a8101229…

MALICIOUS

PDF

82.5 KB Created: 2021-09-09 10:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 42dca231a2ca4ceaba80c65aea46f2a2 SHA-1: 2753b638fbf5e7d546f62ed0ed3c8e0960255cca SHA-256: c2c0e126a8101229c4be3689cd0e0dcbeb1df3d8776b5a38666b0328678211c8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic indicating it's a Pdf.Phishing.Trojan. The presence of embedded JavaScript and a large number of external links, many pointing to PDF files on potentially disposable domains, suggests a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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://aczelzalog.hu/tmp/97923842704.pdf In PDF document text
    • https://essuances.com/ckfinder/userfiles/files/2629905855.pdfIn PDF document text
    • http://vaithun.net/upload/files/87607798531.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/20908762208.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/fobanipofebob.pdfIn PDF document text
    • https://costarica4d.com/contents/files/18886671050.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/87033075518.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/47343696232.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/rowavowisumesovorutuker.pdfIn PDF document text
    • https://topupdana.com/contents/files/rovokefibumabixivum.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161370f9385d6e---dopesukal.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/dimobowotilulazetexavila.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/siwerebal.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/powobez.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/50571443861.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/40294785864.pdfIn PDF document text
    • https://polaria.cz/images/file/mapupegov.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/88453979594.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3259442d553de29b1fbd2d284a282126/gosilezajukajekixajiro.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/53779339124.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/rovizug.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/kefepapizosarav.pdfIn PDF document text
    • http://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/wubekol.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///20210901154523_888691658.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/43662177259.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/76088760651.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=aplikasi+edit+foto+terbaik+untuk+hp+androidPDF 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_off0000e167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE167 16068 bytes
SHA-256: 6dc1ff135f4ac9b4e4ea2e37fe65878ff01cb979082fdaa6d07d397149284f07
font_01_sfnt_off00010aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACA 10908 bytes
SHA-256: 07eab3c06545e619dbe9406acedb196f10ddf017d3ec0a2303eb3ff1bd8bde42
font_02_sfnt_off000123bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1