Malicious PDF — malware analysis report

Static analysis result for SHA-256 698930b681c96370…

MALICIOUS

PDF

90.4 KB Created: 2021-09-17 04:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5d2afac0fb2a49338d415c48b254a415 SHA-1: a5a0c3c420b1276d06fbeee7c1c3cb7a92245264 SHA-256: 698930b681c963705c9312079f6212aa6b9fafdb27d2e64e04eae2144127425e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or facilitate further compromise through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/volojejusuketope.pdf In PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/41922965531.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/jojupumevaverowo.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/pemalemawiketiremufep.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613211d33ab14---vunosezupisokovevanen.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/tdri0o0jlm62cqjfassptj7rs3/80274785819.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/wexupulefamexo.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/puegdckcdt23edaampmlrv3u91/powara.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/73823299142.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/zagusokikeroragi.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/9835709512.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/64635839233.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/rukosufadetulizixij.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/17744230712.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/70729304051.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/fesavezedabaguwe.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/mafagokapijakul.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/radovugudonime.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/kuzefadikeropijane.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/87274582421.pdfIn PDF document text
    • http://meta-min.com/files/fikepivajizawusev.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/96087263722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+setup+your+voicemail+on+an+android+phonePDF 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_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 19084 bytes
SHA-256: 2b7aaa458dda500b8e412b68e6d3ebf9f9d6e9be20dc46c23022ab175232ff89
font_01_sfnt_off00012a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A14 11136 bytes
SHA-256: 46c54f21af57b8d4619262184544271cc9b788d43c8cf1c039307929b443cab6
font_02_sfnt_off000143f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1