Malicious PDF — malware analysis report

Static analysis result for SHA-256 3007c4b9cf96b9bf…

MALICIOUS

PDF

81.0 KB Created: 2021-08-25 12:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 4e7b293df78b1d9f62d5096352d7b745 SHA-1: 510daed1c361f79e527a35a968be6af389486b93 SHA-256: 3007c4b9cf96b9bf68d498d4545d1e4f23acc165c9e81aa204eff92a6037778d
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=big+brother+2018+full+movie+download PDF link annotation
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/uohhcqvmvmai1tli4r0tg8re01/5345272662.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/zetevefajixiwazurus.pdfIn PDF document text
    • https://jetaime-shop.com/files/16325050587.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/b4sr2vaj3b0qh94o7m6mucjud5/ranurozotam.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/61fb11be3d64bb0b51a64d9d1b67d10d/gapemunonifirimilonawadak.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/79466937153.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160758bbe371b9---mazelutululadibuzudo.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/42865232527.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/e3e8f742d516f7d025339b6ea489fc9a/puxizu.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/sd41ev37m4ubbkfb0lci273tt5/31168859289.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/0e9bdeeb022644321821d4e0d5873a38/96808579349.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/93162580153.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/8bf4d38672ff17ef5f7b3a246a0900bd/navanirewofugowegen.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/ace6a3499e05f3745cd8375b67d3e25c/85725348734.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/95135228687.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/buputafo.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/b06dbb878aaee5148461d761f95e1157/joguraribodiboge.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/danogunajilolel.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/a22ed280fc8fa500f40e34952eaf070e/93451766321.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/joxavonelinuvodovojuse.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd0f211247---75888408524.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/venosumetugagitegefuw.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/4950609023.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 11580 bytes
SHA-256: ada830744f46340cf39c93a878c7bdf41af15919507ecfd770c869b4403a4a54
font_02_sfnt_off00010b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3C 16832 bytes
SHA-256: fe8a59b232bf44966bf3926ce407038377343bff05732c93551d2160a46f1d76

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