Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2beed355b0e094…

MALICIOUS

PDF

80.7 KB Created: 2021-07-20 16:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 72f5e405f1489e22aedc92be4847f8f8 SHA-1: db400584ec67297621c9a93bbd1c3de24111c292 SHA-256: 1e2beed355b0e094ca2f3b18661f33fd59e2630b90d5cf885df26b8a87f1ae18
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The primary attack pattern involves redirecting users through a link farm to potentially malicious content.

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 http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709085dcfdd---67706937186.pdf In PDF document text
    • http://phantasos.org/userfiles/file/3603499066.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/ledipatotuzezalikuja.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tmdsh6u9msm93fgdhuf1qkhnav/53423121216.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/kpvlf8vc7bmq16jhe12k36tc25/4889689378.pdfIn PDF document text
    • http://sanmarinreunion.com/clients/c/c0/c0747301521b2fcd71a0106c9132c7e7/File/kixalipigirovamenisetajot.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/rvk5nj1uumdc1kcuemh2r7as07/93172627288.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f19ab0b0c---60706032461.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/44072915478.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210618083158_o3ru6g.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/begabemozikoxoloxuvu.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/tusixegupunadizipezonebe.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/19335302879.pdfIn PDF document text
    • http://stroi-sistema.ru/img/48008361089.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/sdjkg5lbs0os4i5brdv11o9g6p/mumakuduwawesagufo.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160867dd292fa1---94515580946.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae0ee51bb5---kadodasifonoxamitu.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/22833292098.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/63501612920.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/95604871913.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/zaxirufegiki.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d851cfb8a---wisofux.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/55n7rfajof6b6906649p0m2or0/78140501931.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae042128b7e---nelexedani.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=0.5+kwh+costPDF 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_off0000dac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC6 10096 bytes
SHA-256: 05e69bd4dffc59ef3db7487a60f56a247e7b5f9346c331ac77d61ab7a78a63b5
font_01_sfnt_off0000f183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF183 16860 bytes
SHA-256: 10867992bc6338fe533a04e15b9955aced936ace7b30a3192b30206341d7df70
font_02_sfnt_off00011da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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