Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d34e1736affa8e…

MALICIOUS

PDF

82.9 KB Created: 2021-09-06 03:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e1ea9e874235fd5f1cfaf38d49cd09ca SHA-1: 8ffb0066b22ffa5b6072a513f49d39c482b5b346 SHA-256: e3d34e1736affa8e5eb40625a84b11ef926c9a9ae8c001537f81a1e0b080acfa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely serves to further the malicious aims of the document, potentially by redirecting the user or initiating a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://coretry.ru/uplcv?utm_term=literature+review+psychology+pdf PDF link annotation
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/ddc00101f0e65b22b215e65963c83547/gokupovamobiwi.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/vimerajor.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c43b068f51---surilurozumiloxodanipe.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/56506555443.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c6dcd712e---56915545764.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5856d55f2---rijafemetosogatitivinuvus.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/komirarudapomatasareni.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/96365428794.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/59041469330.pdfIn PDF document text
    • https://solo-enoant.com/content/files/files/87029721040.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3692676f89---dokiralutirininog.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0a71b0704---bavimexugulupebiwumomiwe.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/15523933607.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/lurirejefovolenuzogusore.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/xibivifaj.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae919f5d7bc---wewotuzafitoxilo.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/ruwopebarogolusotezor.pdfIn PDF document text
    • http://naucseto.cz/storage/31695355173.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/kimurajukawano.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/14880519616.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/67458308804.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210902064633.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bc5dc9678---mutugurapuponaxaku.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/nibabepaziwekojezis.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/witidukemajitejavaxekoxul.pdfIn PDF document text
    • 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_off0000dcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 11116 bytes
SHA-256: 61c1fdbace172d7d48f929b46fe03fdae66864f3722b117f2b6c8d232eb812c1
font_01_sfnt_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 18100 bytes
SHA-256: 877301bff3659c6df42327d1330efeb94a1af08701c39f46f63cdeccf82b811f
font_02_sfnt_off000125e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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