Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b7b9909c352b0e…

MALICIOUS

PDF

86.4 KB Created: 2021-07-18 20:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: dd6587835b03fd07298cf7d85b78cfb6 SHA-1: a1870ef4f4c6bc165ff4ca058e90c1cbdd930712 SHA-256: 32b7b9909c352b0e39f52ea1a356c9a1e741f4ba26ccb67cf1107b77c7ba58a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting. While no scripts were extracted, the presence of these links suggests an intent to redirect users to malicious content, likely for phishing or malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to manipulate search engine results or distribute content through less reputable means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://www.77ice.com/upload/files/71074616627.pdf In PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/2c2dcbdd43891c883f8ac86b7d7ee138/65444908817.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/igo8th4sb2d1pstphgeo15etit/tutafetopujopupivolixez.pdfIn PDF document text
    • https://avenue102.com/uploads/file/peginofukoxe.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e89133ab6---fosoxuwegitimurixedafegik.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a29db0f1b---61735862484.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/66e34a0b41bd05a60b24f1a1057f2858/40965756482.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/53589963689.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/2c7984fe4029c92419dc9c9c733338c4/35837830246.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/fupez.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/3677a5e30e79c88e7b1733969fe222e5/8035106129.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/3gn60826r4k18a7hmiva5sg8tt/zafozun.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/37856382734.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16070636b70a43---7260272089.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162321456821.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210619024107.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/guwimikifidivak.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/55980133893.pdfIn PDF document text
    • http://fygl.net/uploads/file/201723149194.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/1293773116.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607002a6519d2---33822082825.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/6363387371.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/kuzebemufusar.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/v00q8qncv0d9lk8ulnheq83v9l/naxavazinuxeximiwutaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=cute+stuff+meaningPDF 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_off0000f01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01D 17400 bytes
SHA-256: b7347c99694203f5620396a9ed47889e5d613360cde771737c46a39282eb8212
font_01_sfnt_off00011d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13523 10420 bytes
SHA-256: bea1991a5154e2ab9ccac2852c344371b589c3a9cb92c43dabf3f4c650cac79e