Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e5dfa4db3f1927…

MALICIOUS

PDF

82.9 KB Created: 2021-09-22 19:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e896d68461fd9b302e9fea050047510f SHA-1: a272965295746290172ed1bb5513a9e455c07f3a SHA-256: e1e5dfa4db3f1927cde3baca14744346051a692ecf7bcdcc1bc336e2fc98714c
180 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, including links to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of JavaScript points to T1059.007, and the nature of the PDF suggests it was likely delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 9

  • 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.
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://wastran.ru/uplcv?utm_term=recover+my+photos+apk PDF link annotation
    • https://kolbandibileklik.com/resimler/files/tevipijomiremew.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/95549145692.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/gewawararuzupujekurakar.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/letuwuz.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/sinegazofofajokifexidoder.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/cvudftgn7timlrq8ns4t85t5h5/pewanoladetukejeku.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/wepajela.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/penefafukarovuv.pdfIn PDF document text
    • http://namngonviet.com/user-/files/37880017946.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/fobusasurosafelesala.pdfIn PDF document text
    • https://timminsrenovations.ca/file/6QbFizisfdTza93G.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021090421333022.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/vezawuketapefivujuzus.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/jiboxabiritedebuxo.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/fanugofoxuk.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138474077374---74475391635.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134764c14f5d---gilojulumibumidojarapep.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/81886977106.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/ronikadisixukibodapuwefoz.pdfIn PDF document text
    • https://omegaplus.bg/uploads/pages/files/13977105395.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/furufatasur.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_off0000d772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD772 20648 bytes
SHA-256: 28be02a544d46ceeeb44a3b61e3af31ed601451df265bcd239f38e65f8d04cf1
font_01_sfnt_off00010dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD7 10716 bytes
SHA-256: cd5b46e87dbccf751ebf3ceed9af16a152400163a8ab155e443fb776e3e8aca6
font_02_sfnt_off00012695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12695 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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