Malicious PDF — malware analysis report

Static analysis result for SHA-256 122588b3bfec1ea2…

MALICIOUS

PDF

79.1 KB Created: 2021-09-15 14:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a571ae6f398aaad43069bd5b4903890c SHA-1: 53792b227dc73c083c01a12ffb45e4843e22ca62 SHA-256: 122588b3bfec1ea22c25c6f743cfa7ca6bd8718e5db793de5d6c695e3897f6c4
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous links to external sites, some hosted on compromised CMS uploads. These elements suggest the PDF is used to redirect users to potentially malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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 https://al-farh-iq.com/upload/userfiles/file/53225029642.pdf In PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/nujaralalonu.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/zubavesesu.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/voxowupetafapux.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/31680901738.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/57994337302.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/79163061164.pdfIn PDF document text
    • http://satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/6585743737.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/vasatipevuvozizupafe.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/fjfg5m0fsjgrn0g01r436k9u4n/3861500808.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/gilejeforova.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16137057b4bffc---6057795607.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/89904666040.pdfIn PDF document text
    • http://www.s4b.nl/upload/files/lelunapotewapej.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/93384813965.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/bd284238018021adc5ee808e8ccf9e79/24812345910.pdfIn PDF document text
    • http://kuryakyn.ru/userfiles/file/fonejumoboxulipimubada.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/53993231277.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/77153543867.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/bawojowidivatinexuzupi.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/kelasazufijeb.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/43773670912.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/8c91sgqub6b3o00hf8gfjjqbms/lidowixek.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/1976851056.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/20015335730.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=editing+a+pdfPDF 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_off0000d2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FE 10088 bytes
SHA-256: d14b49aeed13aa56a83cb8e9fc90d5cc4630f6142abb920f25ac000d6b641869
font_01_sfnt_off0000e94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001015f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015F 17784 bytes
SHA-256: 725818cd832d9a481fb3e12a52eb287f9cbd17d6d436b1b0c1013d93e8b5ce31