Malicious PDF — malware analysis report

Static analysis result for SHA-256 565dcd65225e002e…

MALICIOUS

PDF

92.2 KB Created: 2021-09-18 08:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 716ab7101a5613b09efc06d490856f4d SHA-1: 3e404e8e32fd785f47347e7176e2a1a27343a946 SHA-256: 565dcd65225e002e70452df8ffe4a9db0640cd6534b06f459de4c85ef8fd41c7
164 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm pointing to multiple domains, some of which are identified as compromised CMS upload storage, suggesting an attempt to host or distribute further malicious content. The presence of embedded URLs and the 'SE_DOWNLOAD_BUTTON' heuristic further support a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oldstat.ww.tj/img/file/mejusekog.pdf In PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/33842335418.pdfIn PDF document text
    • https://peltonfell.org.uk/ckfinder/userfiles/files/790415835.pdfIn PDF document text
    • http://servmed.net/userfiles/file/metobuzomuvu.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/sawunirotajulisuwiviwo.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/mipobefivi.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/98630945719.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16142b45ae3549---90482404876.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/82283349454.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/26167048677.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/18560538525.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/vabepuzukolipurupopiduf.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/biromepowokuwesotosaro.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/af7329930f2f1a3a84db0500b8466e2d/65338287361.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/zexifozu.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/93413385102.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/lakifoxe.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/15331129391.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/43038778855.pdfIn PDF document text
    • http://nanopena.cz/upload/file/42167774311.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be71699623---1729034452.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-10/20210910191701295319.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/gadowatagej.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/bisapijateg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=patel+patel+english+grammar+pdf+free+download+std+10PDF 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_off0000f648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5A 21984 bytes
SHA-256: 8521220d3576b0a0dce6d443cb9bfae16e4a7aca8f481cb2f768bbcce86be4d4
font_02_sfnt_off00014892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14892 11204 bytes
SHA-256: ccceed61101eb8f2ee8b5d8300b9f3ba86510e2851954960d1f4845b0e9029eb

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