Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a264c96cd2d4e8…

MALICIOUS

PDF

57.4 KB Created: 2021-05-05 16:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd0d706f589944c55f2959e0803575c9 SHA-1: 534743b8b94b3befa09d70db48674c51b4be191e SHA-256: 89a264c96cd2d4e8d842d955002591b9cc8cfe7c81d718bcdeb74df2bda8bc58
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier indicate a high likelihood of malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8773

Heuristics 5

  • 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
  • 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://synerhu.ru/uplcv?utm_term=free+consonant+blends+worksheets+for+grade+3
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733eb3a0b3d---filonojofarag.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/a3e0e64c19207cf3fbff77d0eb415d4b/20899450609.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d54f094b4a---bukubovuposafupuzu.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/72c210477ba44f9b4b040583953aadd1/31348946382.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160929a04c55b6---lizejupikaxirabef.pdf
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/614a84f809f54e66ee34643229425dc5/13479375386.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a9b7a1466---daviroxisoga.pdf
    • http://technoculture.cz/admin/upload/file/kizadozifuv.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/b826fc3eca781926b8ae9bc49c7badc9/18764294376.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1e2a1385a---wusumexezowasiwe.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077ac8dbdedb---fowomojagojib.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608542342541d---sojilegaxapixagur.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d55b78e975---7202783197.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/gn3rnbuecoggva9cnioprfu747/vuziwawupedagare.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16087ef6d33122---sumuriwosesawurerelitunip.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/ec2d745097fb0a322411502855eb114c/migezojabivesa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2d6.bin
e22e8d26987bbe30ecb0f67bbb3171bdd4408a3e082222bf298469d36cbbd656		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D6 5696 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.