Malicious PDF — malware analysis report

Static analysis result for SHA-256 d173e6c828074109…

MALICIOUS

PDF

89.2 KB Created: 2021-08-26 05:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b3ac9081db84f27a222b3fc68940967a SHA-1: 4e807c98692c8a1ad7147106f8489bea0060bdb5 SHA-256: d173e6c828074109a56ec75fec43a1d4444855639d86d1272406acc1d1019f20
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate a phishing or malware distribution intent. The embedded JavaScript is likely used to facilitate the redirection or download of further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/161118650908ff---34409607252.pdf In PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/liibv7gpeoklnkgcvtcj5hrub8/tedenufi.pdfIn PDF document text
    • https://defaico.com/d/files/79405044292.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/92790841565.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093d0b5c45c6---zabuzibagivovibenup.pdfIn PDF document text
    • http://collegedelunion.com/clients/76066/File/rimirexopugikelajezebe.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/13rg7khdr1kstvbr77aoqpac6q/bigexiluz.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/garuruzokoza.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/f35da28604f6f6bb4de41d4142d7997b/dexatutose.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/3245689012.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/bolexejunes.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/47933977015.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/29cca59783f645ffae4b581032eb9fe9/getomenelekawevates.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c2573721e---wuwavofifukelimemura.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079af10f266f---juladutowov.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/retozu.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/43137368983.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079fc839da88---sejifizowisujovusotebof.pdfIn PDF document text
    • https://atesolve.com/ckfinder/userfiles/files/vexowav.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c713f292f01---82990691011.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/26316409994.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b8c011cdc---16114215486.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/aigps24n8aljf3oi7575t0mcrj/kemaresafopolipudutunax.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/63607886687.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=event+sign+in+sheet+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42D 17060 bytes
SHA-256: 6669f65919e94bb5496706f22a0054eadb7caa1696bbefd81b2a95fb4150f58d
font_01_sfnt_off00010fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE8 16252 bytes
SHA-256: 6d568972154aa9e6553788066da68fe6d5b0b58db67a92e881fdc4c3770f4e1b
font_02_sfnt_off000125b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B7 10400 bytes
SHA-256: c41b8d66edd74a5f72e59c95cb63bdeba236d944d8d2d568e9538bd62a0cb07b
font_03_sfnt_off00013cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.