Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0a7026030f96c7…

MALICIOUS

PDF

104.0 KB Created: 2021-07-06 16:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e07189c1906281dce18a84bec298d7de SHA-1: 2e6a70ea51551fd55163abf490a28d6da81d272b SHA-256: df0a7026030f96c7ee8e6d9dd68934746fc495e3da7ae2b920cf2766ec3f694c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the PDF being identified as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://ithaca1962.com/clients/41687/File/36639116428.pdf In PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/9068c2e3ed2445a9982fd0bd76d8e50e/13184566987.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/qf3p9m0n6j2rrelomg85ga0gb4/letopodiwojagowigoso.pdfIn PDF document text
    • https://tipresentoio.it/images/file/zuzugazirevekud.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160907fe25fada---kaxenufoxiwiraserovelipoj.pdfIn PDF document text
    • http://jerilyndavisrobison.com/clients/870655/File/55403250249.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/48720902833.pdfIn PDF document text
    • http://clingac.com/d/files/13623378207.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/66970384822.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609648321770a---16329619040.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/l28reuj064utrl4fk5vid79lv0/16631054588.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/b8bgu18igl3qo7ondl4r8c7o8b/33172227885.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1608bbca1c51c6---67833873161.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88610b7d0---kidisan.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f02ff28c1---runumituminisegatufe.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/3537d97ff4602ad0b4209f3259952099/vudukareb.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/576b8a911f35efd9831b6756087fe816/fozekozi.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/9518505c6000ce1d56f5debd84784a29/jenoxisemusuxugowawez.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/288e684a30acc7511fa16b9bf968265b/gulatileguzanabig.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/maxowanojesuzoxet.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/74fce3d6a3234269a42c31b1f32a4842/wimekubin.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/zeximikabilutizazezot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=after+the+ball+leo+tolstoyPDF 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_off00013861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13861 16600 bytes
SHA-256: 4999a37f44fd44cb3ba1eb6d075b868bb8f3a5d83eca00e46aa92fc8323c4db1
font_01_sfnt_off0001636f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1636F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B86 10352 bytes
SHA-256: 7e81cd9f6929d6ad8e767b91537e5798cbc6cef29dde14345cbc7dd49a9eef07