Malicious PDF — malware analysis report

Static analysis result for SHA-256 704700151c77ad37…

MALICIOUS

PDF

77.2 KB Created: 2021-09-21 04:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8741f34eacf2708babcd13a14c73607f SHA-1: e5058ae0535d4b942d0a731ecb210fdaad9b0964 SHA-256: 704700151c77ad37962502683198fdbd1b38e33c2a0d5c36ff7b91bfbd81b6db
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external links, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No specific family could be identified.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://orenprom.com/img/account/file/95218781320.pdf In PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee1c936cd7---33757662715.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/leniw.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/p01oe5f6sbj2ophks3lr6ud14m/26474601546.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/78773137497.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/29865316266.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/bewupomixago.pdfIn PDF document text
    • http://alvitraders.com/files/sozuku.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/3aedfeaa687df1ddfb0dd30a22e16728/simefek.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/65656563860.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/53748173805.pdfIn PDF document text
    • https://organicearthfiji.com/documents/file/jozuzinu.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/68777463562.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/99510949022.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39965218294.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/sepufibig.pdfIn PDF document text
    • http://oris-am.com/editor_up/41048170525.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/18850593115.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/repamupevexajaluk.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/16089006189.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/34496604284.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=stomach+anatomy+positionPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/gugilekinovike.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 16984 bytes
SHA-256: 7655d7cfecd921dac5808defcc7a462b77a3c483099dc3e123ba21062b1781f1
font_02_sfnt_off00010f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F31 10552 bytes
SHA-256: 85f38197e5eae89359c1160b89b380f42ec563ca463020a36ed03022fcc76681