Malicious PDF — malware analysis report

Static analysis result for SHA-256 958a68b38d61a71c…

MALICIOUS

PDF

400.8 KB Created: 2021-08-02 05:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f22c6f0b621ee75e71fa83a1d414badc SHA-1: 16d3f2855e7b56a4c92be8330a089c68a0fa0514 SHA-256: 958a68b38d61a71c818a11db5e06dc9ffd6623e56279a9c6f45ea3a541a72097
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of numerous external URIs, some hosted on compromised sites, points towards a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9006

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://tamker.hu/userfiles/file/fuwami.pdf
    • http://mpu-beratung-brendle.de/userfiles/file/32298226252.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/69c5dcbee2d3caf71e3a098d66ea3e16/nijusun.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160f082649b489---22119596063.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/fuzirurikozujimeg.pdf
    • https://gymlesgeants.com/upload/editor/file/nedenenutate.pdf
    • https://motacademy.it/file/11201563275.pdf
    • http://areaarchitetti.com/userfiles/files/fenukojeg.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d532ac2fa29---mujawedatitaxatopakabeju.pdf
    • https://sedefartphotography.com/resimler/files/tuveze.pdf
    • https://accounting789.com/ThImg/file/58643311579.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/1ar4u35djhp2slu77ap1r22fhi/wipanusifixowugokeju.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724eb623cd4---32601188315.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088438fb4232---zetodiki.pdf
    • http://colorfulmedia.de/fotki/fotki/file/gedeketubuwavijotezafuvo.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2s8ls4ufcv40v22ko25k2q3lr6/sorisowixudovebimigule.pdf
    • http://okfilm.kr/userData/board/file/memoseporuripoluze.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092cca91f36f---vajivagiraladafezotaj.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fac1ba502d---zejefalafotaninedalutev.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/2b65583ebbd77f6ee9d14f0adfa3d636/95363886337.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160dedd2d948ae---lutakufivabeluromo.pdf
    • http://laros.cz/UserFiles/file/nuroxipab.pdf
    • http://chalappuram.com/userfiles/file/25269071110.pdf
    • https://atraba-holding.com/userfiles/file/fitakol.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=star+wars+the+clone+wars+ahsoka+tano+age
    • 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_off0005d3aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3AA 16792 bytes
font_01_sfnt_off0005ebbc.bin
21e52c09887a68a807c3604b1b457792f2e2f93c9cf6b84162de877a2a6fed4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBBC 17464 bytes
font_02_sfnt_off000618ae.bin
7e4a40e0a55a23582386f1e9b705bb1d8924ff900db0ddbabeb1375c2954029a
pdf-font-stream PDF embedded font (sfnt) at offset 0x618AE 10672 bytes