Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eae8963a4ca949a…

MALICIOUS

PDF

72.9 KB Created: 2021-09-17 16:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 060c2f34dfc06cc1df4d03dbf8faa4d7 SHA-1: 5e10c5247361f342e1467b3f34ce7c3a12254bc4 SHA-256: 5eae8963a4ca949a6f3e1f3a235118484b9cb3ae2bee33273d285f287d478537
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document provides instructions for an archive, often used to bypass gateway scanning. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://kindergartenhelden.at/upload/file/69095039966.pdf
    • https://catbasailing.com/upload/fck/file/93136933918.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161401a986c92e---24173270295.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135526c2d217---saneruwigob.pdf
    • https://sapporomn.com/userfiles/files/38996075189.pdf
    • http://cnpair.com/userfiles/file/lefamu.pdf
    • http://bud-med.eu/userfiles/file/bixusuvuzamutemux.pdf
    • http://stoka-saarlouis.de/userfiles/file/63024265106.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/ffd27601921781379d6bb0be5ca95b57/nagasavisufiwilo.pdf
    • https://beauty-full.ru/uploads/files/wuxeforejek.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/0f41def79f0d2a5cc6c9b3b91a1a1b8d/veteroxokoxumutozovi.pdf
    • https://sieuthigo.vn/upload/ck/files/poguwujijaviwomobuvag.pdf
    • https://feng-shuiworld.com/userfiles/file/filinosugotiwegutupaf.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ac35acfae---vezobawekewoxidon.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16131f8632d483---datubigi.pdf
    • https://aathichudi.org/userfiles/file/rumivenobusajifigemazan.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16132b95f47995---paxuvebadenajixubaje.pdf
    • http://dinhvi5s.com/images/newtech/files/37998737987.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed31ef1912---jutajelisojujubumiseboge.pdf
    • http://xinyaoqiye.com/upload_fck/file/2021-9-9/20210909151805201208.pdf
    • http://artpolyclinic.com/file/files/jomuzilugikajebiridelan.pdf
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/fodupafedabokiwe.pdf
    • http://bjerkelunden.org/content/files/userfiles/file///motinetovobixe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=saved+passwords+on+android
    • 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_off0000bce3.bin
8577e8cb084327394eccbb136e85675a914c0162fef01f7b0c540ea5b90e9236
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE3 16240 bytes
font_01_sfnt_off0000e643.bin
1dba9eda9bab6b7995a31ff2d0073352335686c3d657259643475d935c7bc34f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE643 10468 bytes
font_02_sfnt_off0000fe25.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE25 16792 bytes