Malicious PDF — malware analysis report

Static analysis result for SHA-256 0089e0a52297d850…

MALICIOUS

PDF

87.2 KB Created: 2021-07-30 14:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c039d4a04336733d83a1c3b638adf75 SHA-1: dd96558936fb48d6c92618accbecf75225b15457 SHA-256: 0089e0a52297d850ebf9a1089caafc5dc70426b31ae253803e2f1ae42e452433
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://haltia.mx/sii/ckfinder/userfiles/files/11539268824.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a1b2ef1252318c0e42cce4037551e99e/lotaterujub.pdf
    • https://ei-hotel.com/free_images/files/3182275707.pdf
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/totezonixosir.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/aa0093ff3e2d5f38806bdd436a97516a/selez.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/r71u4ce73u7ak24q2fta460ai1/mevageborag.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866c9d49517---pomujukodanasiferebejo.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ca6472020---gazunos.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/9jlak3lojg18q2bnksc5odjf5e/bofosegidepalebizer.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/7ensdodmff6ud4v4732kleh352/modoberegusob.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbbea2c79a---56244061597.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/47a00d33920df57fb9891d62421bc274/78976030914.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/8mvs3isgji49inhvuc57sgqd0h/8125508467.pdf
    • http://shqinze.net/admin/upimg/file///koduxonifetuxifurod.pdf
    • http://orikon.net/Images_upload/files/tobide.pdf
    • http://ok-poland.com/userfiles/file/fawupufo.pdf
    • http://harekatmemuru.com/images/Media/files/62692212626.pdf
    • http://ghioroiu.ro/sites/default/files/file/12125825819.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b8ae18c66---duroguguvenoguwani.pdf
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/57124312474.pdf
    • http://blessingsngo.in/userfiles/files/gedopi.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/066fecde0b418ab3acab0b5d969b3346/junevatilagafizumigukax.pdf
    • http://thuephotocopytaihanoi.com/upload/files/77259042170.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/3233f484f6cc03fc5a2cd43c77059e10/19578807184.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608009d72ca0e---kojoganumisevosaxebazavir.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+get+premium+truecaller+for+free
    • 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_off0000f0d4.bin
ba47ae6b1b8533fab07be54fe4bf456b8054a2350257c0ed09fc754dc03dc198
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D4 16644 bytes
font_01_sfnt_off00011c0f.bin
6b2ee07b9e26273958e4f9d4c1b5a8fdbda314b94907bd2dd458882bbfe6388a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0F 10728 bytes
font_02_sfnt_off000134c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x134C6 16792 bytes