Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2ecce193dee93a…

MALICIOUS

PDF

77.3 KB Created: 2021-09-03 03:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6c8725db48a900ff4f71559675b18fdc SHA-1: 47a422691923cc410ee027b1fc6794a74df7f47e SHA-256: 1f2ecce193dee93aa2f2808c301246324c8156e9f10b0d1b571b153732eeec34
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm pointing to compromised WordPress uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://soupworld.de/upload/file/fagibitidopavesel.pdf In PDF document text
    • https://socohoteldanang.com/uploads/image/files/bebinosezibadenasotumap.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/95350325307.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/31772713108.pdfIn PDF document text
    • https://appfacile.it/file/74570845680.pdfIn PDF document text
    • http://yjccnc.com/upload/files/8942761888.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/lijuzuzokijojig.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf23498ea5---85957527353.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/tobiwuwadot.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/86c476b4db9406cf5a1d421b02bcfd51/70366583090.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927b1fd1195---12756835298.pdfIn PDF document text
    • https://activepymes.com/pub/file/16809002004.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20218251849126354.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/vukutejugexedilituvonowew.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1f38db21af---76822833603.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/43303911310.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/412e1bc7ba3efd7e5465448e3ef34fa8/gotetopofalemu.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af4fde8e43b---11043488778.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/90282000566.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/5bca153efc142b68f11115fa4765043b/54167088622.pdfIn PDF document text
    • http://asustainable.com/global/file/wibopawojusudukixegeku.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1608312ebe4209---puluworubawagaseje.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/salet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=sma+10kw+inverter+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_off0000cab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB1 10820 bytes
SHA-256: 95a21332a14b8259e5bbfbbb1faecec3c781a74e85ea4abab8074367286b841e
font_01_sfnt_off0000e3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 16948 bytes
SHA-256: 71696622c98eb1178c64662082e132e6fe87ebab08f34f2a98bba794f670f6ca
font_02_sfnt_off00010fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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