Malicious PDF — malware analysis report

Static analysis result for SHA-256 2132ff2540a05eb5…

MALICIOUS

PDF

100.4 KB Created: 2021-07-07 00:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c541e7e8841ea8144c5e8449bb7c62ed SHA-1: 1caa8966c371e1d2c34769c0f9cc5d1352963d83 SHA-256: 2132ff2540a05eb56112173891d719b75a011ef5db66d102361df67db63fee3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that form a link farm, pointing to various compromised websites and potentially disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to distribute content via numerous small, non-clustered links. While no scripts were explicitly extracted, the presence of numerous external URIs suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

Heuristics 6

  • 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.
  • 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://huntic.ru/uplcv?utm_term=the+meaning+of+emporium PDF link annotation
    • https://fuoriscena.eu/file/joguzemavuluvawos.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/97885404580.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/cc0f958c7539693efd15431fbc93e19d/fotelupaj.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/84815786965.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/pm7nvei7s7rl4q0eejmtuo5d13/38474895589.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/564b09a2b16fb08bd367c75d5c0c0097/12689306775.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/tojijabuzoz.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/gipojipagexigemixepuban.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/92172277e39ea0a4ba85a78ed16eb007/2931382123.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/56723531881.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/95606274798.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160811106030f4---vadogo.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/6128fb9d5214d7f4f8e4c02a2667f827/37771511676.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607298601e0e7---10548397900.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/xevopozodaligukumiwipezo.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/xamesepugenujuwu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/dd25dqqnm6nk57ns71dsc4d3a9/77470620080.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/21918978281.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/xawazemuwopu.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/2c59c879faeeeb42ed16a3400551d4a5/zobolurus.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/8cae0e768d60b7ae4d4111b8907905b6/80082658082.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/78005435e7eb57f35ed9ea638756bbb2/nazojuxetitanof.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d678507268---82620700635.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4619418215---54457897200.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF935 17032 bytes
SHA-256: 7eafc141b2b4446f27a05e0e285e47ef1d21082b283b9ef42b4d378844492806
font_01_sfnt_off00011206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11206 22048 bytes
SHA-256: e6fbfa13c51795cb11aee83e2d087776483c2e62d307f3102460a263a79830a5
font_02_sfnt_off00014905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14905 10556 bytes
SHA-256: 262d239634cba6e69fe468589da1b427a8bcff70b874dc5488d284d2a070b510
font_03_sfnt_off000160c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160C8 2608 bytes
SHA-256: fc2d65be94e9ebac72c9fdbeaaea14631eb886550f875f911d9e28bba48b48f5
font_04_sfnt_off00016c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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