Malicious PDF — malware analysis report

Static analysis result for SHA-256 96414ee87b5744ea…

MALICIOUS

PDF

89.2 KB Created: 2021-09-05 23:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 78ec33ef6ff90999356fd9b3ad5c868c SHA-1: ed5ea32635969038b26622159dfdc740f9924596 SHA-256: 96414ee87b5744eaa8e8dc5b9140a68a75d2a68c3a72e8e1035622a7b6a26aaa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable domains. This pattern is commonly used for phishing or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://c-six.it/userfiles/files/78355881538.pdf In PDF document text
    • http://www.saito-ken.jp/userdata/file/wotelav.pdfIn PDF document text
    • http://feg.vn/uploads/files/41034907390.pdfIn PDF document text
    • https://smithsgame.com/calisma2/files/uploads/82000867616.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/79432359647.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a15397b9abb---42142097080.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/kipuwirifalafakosinum.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/68909932440.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/doniwixixixokav.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021062404031539.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/92003075074.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/39459472536.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/49284235572.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/27219124752.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a94272b8054---31794162196.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a74b6c9f10c---zovobupajukinekapakab.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f3963733938---xipodikewariwanijodig.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/cf9m3p3hccm9vo89lrs40jsh7l/pozifogaroruronano.pdfIn PDF document text
    • http://thedreams.cz/files/rakepovolavobararotekij.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/pidupuvofurebafigefuxuw.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962fb4a09c9---tapefog.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4839a1b57---35955963764.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081584550633---fazokiz.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/lesudexurix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=free+long+division+worksheets+grade+6PDF 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_off0000f36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36C 10916 bytes
SHA-256: b12c41d1efc77d1a4507b4e2942448eb11cc8adf090072a73a5aec1821e5b220
font_01_sfnt_off00010c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C81 19284 bytes
SHA-256: cd081136d86c59402aa66cb7c0cb76a4ee62c010b97e4e675dc9407a8cda38df
font_02_sfnt_off00013eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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