Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f269df9a0f3ee4…

MALICIOUS

PDF

86.4 KB Created: 2021-08-12 11:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7e1c65e122f170bab514a701955f5e66 SHA-1: 5ae81d111c87ccbf1b9e13ea9eb5f5c59c89dcb2 SHA-256: c2f269df9a0f3ee4e8af350d6846f5d1a54a83bab88e6023aa6eb84b8381a238
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm for SEO manipulation or phishing. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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=aladdin+2019+soundtrack+zip+download PDF link annotation
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/c768f310e1e897ea09cec864e3fdb56d/30952120644.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/laxef.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/sagewi.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/6va4eilfe6ka9pg2ipiv07ob60/golepixajuliwudexerumoxex.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210805145838.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/23e7000ab55c32a6ae44480ab9c17c2f/2843853765.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/radanevilatufomirufiv.pdfIn PDF document text
    • https://abeess.com/userfiles/file/26545234188.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082a4beedda8---14570094770.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22dfa98078---pekuxalex.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7618a5c833---34129102065.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/kuduwupafisutuxa.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/3906598371.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/piwarapajozab.pdfIn PDF document text
    • http://stasta.com/userfiles/file/15370194029.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabe2246817---58954834902.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/ruxivasax.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e372aaa1e02---kulawifoludanusajulenuz.pdfIn PDF document text
    • http://lucann.com/Upload/file/13797206315.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65d33e6014---zejus.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/64272016787.pdfIn PDF document text
    • https://tlkingatlan.hu/kepek/other/file/sakur.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160add20fb1fd1---dewafasowubi.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a45255931a8---31670798769.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/85670393251.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/a9bea0ce253fa5d4c778b9269594cc10/34679224802.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_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 11156 bytes
SHA-256: e00385b411af4723b72d492e5668d151c14b169a9ecf643103902880dba5f670
font_01_sfnt_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11397 21848 bytes
SHA-256: d90a537329ea0a260f58cce0ef5c3c66d726589a3536a042c26d198fa0acbc43