Malicious PDF — malware analysis report

Static analysis result for SHA-256 29796692010e2184…

MALICIOUS

PDF

79.0 KB Created: 2021-08-16 01:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a5c5ef9bb7d6b2ea38c5d0a99b833ef4 SHA-1: 23a1657d0dd41d33795ec6ed006f07ba6a928efa SHA-256: 29796692010e2184e8f1f67d444153cb265c709560c8bc6a6c29a909cd4c2b2e
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF sample was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains an embedded JavaScript stream and numerous external URIs, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary goal appears to be tricking users into downloading further stages of malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://drafthe.ru/uplcv?utm_term=engineering+mechanics+dynamics+meriam+kraige PDF link annotation
    • http://taispacedesign.com/upload/files/sulovulefuluwawivu.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/58552789210.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608ac91864cb3---derezominaja.pdfIn PDF document text
    • http://auchli-appenzeller.ch/userfiles/files/12063530805.pdfIn PDF document text
    • https://groupunsur2.com/contents//files/nazekisaburipadadoramijo.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b295ed42539---mixufi.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e2664595726---37127870740.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0674f6eca0---57086813970.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/rogujakijojunesozopukevip.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/16670110279.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/farajajorikajikelar.pdfIn PDF document text
    • https://nhuadailoan.vn/upload/userfiles/files/dalemopuxinusowezuvofikat.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5e35052f10f5e57f8d447e2a55175fe5/juzutepebuxabenuvipajida.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/b97d5e60333300321ca037a847ff12ba/35257444709.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/76723004580.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/e6jvbag0c459e6bre9cn2914hd/xinikufuxixovadewi.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/6420f779a378e01b5897735c1cae3a7e/10193115703.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/76713788416.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3bdd13055b6ce6ec1e0af3352653835/86641445855.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/notexotojojeposajo.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/53832894841.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/rijilowawumapijovoverap.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/c0195e59f22d9769d18636ca30ea0c19/46052392570.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_off0000d299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 10744 bytes
SHA-256: bcbfae0d42bcb5c3c7d152d3f37b54865f9738f014eddfecd1e2d50d03184f22
font_02_sfnt_off000102f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F7 16624 bytes
SHA-256: 39631851657a66bbb3d6910ac395c1a78b90f0343e91b2d5056ce3ddb1f749b0