Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e61dff18b6e040…

MALICIOUS

PDF

81.0 KB Created: 2021-09-01 23:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 13eb831ce8da754d6ddb5e42a8db906c SHA-1: 52701f44306a9474595780a94abf3d1f8ce50865 SHA-256: 47e61dff18b6e040f6e3494133af779885ae12c6bc45efb4a1bb548b3b113c6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm hosted on compromised or disposable domains. The presence of multiple URLs pointing to PDF files within plugin upload directories suggests an attempt to distribute malicious content or conduct phishing operations. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/pnfo0lgp37j766bqcd10qkqhig/36367926945.pdf In PDF document text
    • http://train-in-japan.com/images/blog//file/12240968677.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/55b0c06a08117e55446f46529176a678/29926884346.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4803541b9---xawopimaxigo.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/a966c1b2d4c56b3c599a05b7b578350a/11065743464.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/e058dabb39f464c1213b818c37fa100b/xetimujedur.pdfIn PDF document text
    • http://mp-journal.com/media/file/78680046443.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/tupasasedepoze.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/15290270794.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/17020742025.pdfIn PDF document text
    • https://somogyplusz.hu/files/21901635368.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/f4eec1803a96949bc75fc4d24385cbe0/682275272.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/97404497369.pdfIn PDF document text
    • http://stattus.com/assets/file/83767019755.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/dadesiwuxumanirelewed.pdfIn PDF document text
    • http://georgefamilyreunion.org/clients/86186/File/55585673782.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/kpu4gb18j3p0pmp6s3lkccsek4/mebinumutafunup.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/bovemobivokolopem.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/fukuwarukamotu.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/56285426301.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/75646370499.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/pumunutalunujowakilobino.pdfIn PDF document text
    • http://phuongdonggolf.vn/app/webroot/uploads/files/85883366678.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/86919132548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=excessive+thirst+toddlersPDF 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_off0000d9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B5 17520 bytes
SHA-256: 0a0ed5fe17dc8c81b2d6b784f869e952747229eebb8b8e37176a5dab8727a782
font_02_sfnt_off00011f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2D 10352 bytes
SHA-256: 40278fbd581809803e1919a86a9fe8420718c3c0bd7ed440cf24cdc08ee48af9

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