Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe364d4418c8f30…

MALICIOUS

PDF

82.6 KB Created: 2021-09-07 23:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 81b6847af50ba71bf8702ec7353eee71 SHA-1: edc48f0f258832af73928d34d215269d0f20f36a SHA-256: 5fe364d4418c8f305c1ceeffc13ed6bac2cf417cb41fa759e30ba8fe05c172c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of numerous suspicious URLs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082c9ebc148d---67589807602.pdf In PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/156e2a160c363dcb227ae9ac3ef5d5ed/wugaki.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/5e4651756d84317299823735c661d164/patazitudenakaresitab.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/8a1eb6b93b747278aad3d54928c2640d/potuzedujetid.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608598b511be7---6118293108.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b65515d03a4d451690f5e53019745d5e/bivaronufuxazakepabirejo.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091ae283dccb---dopoguwavoxosefobiroxepuz.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/gapozigomibuxi.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4988e795b2---51426947715.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/961d1b92c7650ea6dfe21df5bf66114e/luwov.pdfIn PDF document text
    • http://badgerhillfarm.uk/37131225744.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/11590076851.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/51798532224.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/55562820642.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/samajopiweg.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/75903424591.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2so5042l6bfol1l95cdevlbh70/76750897943.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609717c4ef921---96512260152.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/larunifu.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/misoxit.pdfIn PDF document text
    • https://cuatudongbinhduong.net/uploads/files/10039925229.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/zoluzitas.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/zalosubij.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/84915319863.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/88513936039.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=double+acting+reciprocating+pump+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77D 16984 bytes
SHA-256: f5856369b06305a6f8a89304e3a1b963d0466bcea59c81d4fea304d47cfea06c
font_02_sfnt_off0001236b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236B 11036 bytes
SHA-256: e4d812e9454b52e0126df04cfa3ff092ac733167a0923faaf38ebaf794decfd1

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