Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bca89aebe5a68e…

MALICIOUS

PDF

73.3 KB Created: 2021-09-06 05:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5b586c1e5faf7731dc83a84cca50993d SHA-1: 1b67cfe879c2f2bb871b5ae75ce5a25569656204 SHA-256: 69bca89aebe5a68e3ca3dfe8cd7b5ea093c7dcb3b79f88b278d09cdba0d2ed81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and link farms indicates a deliberate effort to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b882b767102---79901856207.pdf In PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47fa349013---87090012219.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/46224555462.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/55830981587.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e4aa28a96---94459038183.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e1ef62da13---95515191829.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/c8b10c29eabd89f5c0390243922bc8f9/figifudefu.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/63799927239.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/c30e042ba138ec7e61fa6187403f7aa9/xumisajisiwabaf.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/zugudunegugetolagovos.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070fba84e860---40491324929.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/42ba710dbc4aa420e301886f8d722242/42917148442.pdfIn PDF document text
    • http://zatexpress.com//upload/userfiles/files/sopuzozeposagepagu.pdfIn PDF document text
    • http://chichen.asia/ckfinder/userfiles/files/jabusufetopaxipuwij.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/koe30je24jdbacus2ejm7jfpe0/mozino.pdfIn PDF document text
    • http://merwepizza.com/upload/file/desupugekokikeno.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/cc0f3733e656834011295c79610bc4cd/voxegawabora.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd4440f1a6---wivagazuwipetuvemi.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/77825083627.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16134c4352d868---93081472809.pdfIn PDF document text
    • http://scmsalliance.com/clients/864514/File/23618653441.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/95710422139.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609d50f379e87---zavupuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=comparison+of+adjectives+worksheets+for+class+3PDF 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_off0000baea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD301 11460 bytes
SHA-256: cf9eeb0c6c9dbdac7e044e5fe22ad906b346e457661db982c8cce97307dffa84
font_02_sfnt_off0000edf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF4 16308 bytes
SHA-256: 7ea8cf459e0fc44d82b8e6a1c4a0e3b65be01d9bfa8ebe1a0d5bf6cd82e9bdca

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