Malicious PDF — malware analysis report

Static analysis result for SHA-256 be162fd53748f4c2…

MALICIOUS

PDF

97.9 KB Created: 2021-06-30 02:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1c15649cd6c705a37778a611548d3ae SHA-1: 1f570b60e05352dba4b3fd837f9f27f9991b8749 SHA-256: be162fd53748f4c22aeee8b54b691e8146e0bd4e81a5fb76425d0c539b490a8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160850488399e8---vusuwimasosixu.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609162080185b---bavogemurizuzimazusug.pdf
    • http://hkacca.com/userfiles/22473331504.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16083fab51ce08---29988891387.pdf
    • http://donaldbermanmaimonidesgolf2020.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/97502379315.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886d08cba93---52973077249.pdf
    • http://kap-group.com/ckfinder/userfiles/files/dejudobetitadurasotoxovox.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086d32fd5c61---10664349885.pdf
    • http://pattersonandoliphantfamily.com/clients/875492/File/96477228666.pdf
    • http://poorclarescork.ie/images/moxorusawolavox.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079bd55b20af---pemipibodokegu.pdf
    • http://canadapremiumlubes.com/survey/userfiles/files/30540683846.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/375b8528f927bcf5fc5a404e24a1c454/25058089145.pdf
    • http://kowel.com/ckfinder/userfiles/files/1624115608.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f4f89b357---47536154146.pdf
    • http://garystrike.com/clients/3/30/301ae0ed988f9237e4cb8f8c41f6cb36/File/wekapomavevarasemekifozi.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a8f72a517---kenuno.pdf
    • https://timjanen.se/anvandarbilder/53/files/75063691807.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f21ece18b2---tuzuzut.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bad0e7d246---lasepisilo.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/ddafb73eef42008b85ed0a79e76b6321/xabomukipuf.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/qku78f42l6hddamilq2picmeu5/4202009002.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607884dde8629---27263499748.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964513db2a9---91699262460.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2d8c987fc---bupul.pdf
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075458f5b77d---savamepodawigovufumu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=network+ethical+hacking+for+beginners
    • 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_off00011d7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7D 16792 bytes
font_01_sfnt_off0001358f.bin
f11661b49603cd8566d561ac49e03c0f0386ce7715b3b1ee607f1ca52460b97e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1358F 16624 bytes
font_02_sfnt_off000160c7.bin
c80444a747db4e58161febfb472a7439d9e48d25cbb83f6356fb0144999702c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x160C7 10908 bytes