Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7da5e83b00ea223…

MALICIOUS

PDF

78.0 KB Created: 2021-09-14 01:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: be95c8b9cbb4156c7c2198dce20730c5 SHA-1: 6ba377f274f831ca3284016086e8999d2f117e93 SHA-256: d7da5e83b00ea223a7e8e127e61891bca4e2bdeb1be092eb909ad2a4bb00a305
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of embedded JavaScript indicates potential for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://crysiq.ru/uplcv?utm_term=desert+survival+shooting+game+mod+apk PDF link annotation
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16131487aee8b1---38289613775.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/digasadejolopetife.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5601951584.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c07f09b4fb---36765581405.pdfIn PDF document text
    • https://ostrichtours.com/ckfinder/userfiles/files/kaxelaforinonebipaxi.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/91329640472.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/a6d5341666ba9efe6e9e632f8f583b76/zovisudedajiboroz.pdfIn PDF document text
    • http://jacsonsfurniture.com/userfiles/file/24605144483.pdfIn PDF document text
    • https://bliznacite.com/files/dekelasogifim.pdfIn PDF document text
    • https://1000families.eu/userfiles/file/3480745958.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/37669477500.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/tubodaxafufeke.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/25191010277.pdfIn PDF document text
    • http://coniperfumes.cl/js/ckfinder/userfiles/files/jafedajali.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/zinusukakawimanobi.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/86032213666.pdfIn PDF document text
    • https://scalping.ir/data/files/file/63168022202.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/tegesisunotiwekotizizovoj.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/74120344403.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/36810208829.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/podupuzopukixozirekamid.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/xopumopubanizumaguj.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137df2a9b633---kipunamoteme.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1ceb7c9e4---96906483042.pdfIn PDF document text
    • http://kelt.pl/userfiles/file/kuvofewuxudinera.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/42584090396.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/56826242475.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_off0000c4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C0 11100 bytes
SHA-256: 5f6580d5b8251040a4c120a1be7841808fed865608bf9ac0302f85c6f1a60222
font_01_sfnt_off0000de3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 19728 bytes
SHA-256: bcd60da571a8318ab923702342e68cd7fa2b6c8e1edeec161855e7cbcc7658b7
font_02_sfnt_off000111fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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