Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed69ccc942dde2eb…

MALICIOUS

PDF

80.4 KB Created: 2021-09-10 02:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6e0ae7951e9808f87669a1f8b412141c SHA-1: 96f9249c22b732957562102b4478ecafc7eea8d6 SHA-256: ed69ccc942dde2ebb2b49de7a84c642126f37fc36523ab59f761f67da8878e64
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through a link farm. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bamfieldrental.com/userfiles/file/22632097150.pdf In PDF document text
    • https://groupekineconcept.com/userfiles/file/31533668591.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/94960184982.pdfIn PDF document text
    • http://onelove.cz/file/tepegitiw.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/mezigafitimokib.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/suwudotedoluxataziko.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/62005703714.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/bchep1kscscarep4rabpaf58m8/jemidefakuviximow.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/wavinitupobafifup.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/71922527200.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210901131427.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f741247585---36389633248.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/53834510361.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/doxunuzuf.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137279d3686b---17811085909.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/6a54c8cdf3694755fa4903a6519a5000/22016982960.pdfIn PDF document text
    • https://labelmarket.pl/data/file/wazirujegivuveg.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/doxufobutitagafefuvep.pdfIn PDF document text
    • http://leton.pl/userfiles/file/88938284891.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161347f91cbf1e---2062392969.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360af5375d8---legofasofux.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/47388233096.pdfIn PDF document text
    • http://goldia.cz/data/file/xefezogipasotuvazo.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/zelukibumomufaweme.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/sadude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=to+do+list+app+android+source+codePDF 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_off0000d684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD684 10572 bytes
SHA-256: 5eadca530aad49d00f0a1f4e0407a208af0374878a24e1d07218f8ef00331fec
font_01_sfnt_off0000eec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 17180 bytes
SHA-256: ad69206cd946c7fb0b00fad921439c58f6456d4414eb0fa04ab8659656f8dd16
font_02_sfnt_off00011b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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