Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea06799c32709e06…

MALICIOUS

PDF

91.6 KB Created: 2021-08-12 17:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dcae7661530a393177b74bd19439946d SHA-1: 1929340c538b5f4daab26793f673c3e2ce2c2a05 SHA-256: ea06799c32709e06a274b66c4aa6a655ce6ca880ac476a1dc003599e46e7c77a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it is a link farm and a social engineering lure, specifically a 'ClickFix' attack. The document body is heavily obfuscated, but the heuristics suggest it attempts to trick the user into running a command, likely to download and execute a second-stage payload. The presence of numerous URLs pointing to potentially compromised or disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 https://garglob.ru/uplcv?utm_term=how+to+uninstall+gs+auto+clicker
    • http://guides2alpes.org/uploads/file/biligalujixukeka.pdf
    • http://progfin.pl/userfiles/file/nabemefikomo.pdf
    • http://dienlanhtruongson.com/upload/files/69422484706.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160946e28199bc---83319141167.pdf
    • https://unserbiokorb.ch/userfiles/file/latuwe.pdf
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/nobivigudositezexaxolu.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef9d37272b---47915748334.pdf
    • http://latexindia.com/userfiles/file/mozitopaz.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9fccbc10c---91439346841.pdf
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/kunobowidubodukuja.pdf
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/dadafeja.pdf
    • http://boldogelet.hu/media/jezaxomaferap.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c300b3433fe---kitekirinomevikerefut.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/p9pamn0tdhkv1nivugkhpp6287/39374682493.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a632e969c5---72272114192.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16080583a8a43b---56024123200.pdf
    • http://myblindz.com/fck_user_files/file/95828041726.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/e8969b4c711939883dc9790862c74e8b/xotixebemi.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/013b26a9dd79af657086a087d98f9966/31228297820.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080d81d6f5eb---lowegakixuvapagu.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/6bfc4042e917fc99555727ce7ed1e3f4/10124010547.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/91927485119.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_off00010254.bin
5ee57dcba3f5452ccedf6ccc80c75d51cf9c6b97ab89ff73a454c2cefc9ff01d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10254 17272 bytes
font_01_sfnt_off00012fb4.bin
1946c99c01dc965e3e2c10ecc1caa6e61204422dc7ee77d420adc86fb86bdab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB4 10672 bytes
font_02_sfnt_off00014860.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14860 16792 bytes

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