Malicious PDF — malware analysis report

Static analysis result for SHA-256 62417bf748d378d0…

MALICIOUS

PDF

70.9 KB Created: 2021-09-11 03:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fc6e7f23d0ed3e3e33a3c6e528012edb SHA-1: e232d1f229a5e883f10227c6972383c380fdad34 SHA-256: 62417bf748d378d09543b9fc38b3c04982e520cea2f9a50776aee65c43257e75
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://irlanc.ru/uplcv?utm_term=sport+tv+free+watch PDF link annotation
    • http://villa-margherita.biz/userfiles/files/pugagatowi.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/karikamomugifoguxofaperuz.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/gavarefenomunexiziz.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/lewabivefel.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/fomutuvejomipinokujudaxis.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/82816061788.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/78446762278.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/foworijexajojojadak.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/81025616148.pdfIn PDF document text
    • http://cwpni.com/userData/ebizro_board/file/xoxibuwa.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/zegex.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/87159180669.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/56236557892.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/aa9455528b8546cfc138052fa3b47d9c/73772536577.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bda3ebb688---geber.pdfIn PDF document text
    • http://vodnik48.ru/content/file/zupagewikirex.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161348e79b742d---nafukegixozowafabibes.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/tetu7flujn28pl3adalmnel4fn/zotuganebuxuxatewapi.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/47534418484.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/gozejubezexuxubebodod.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/lalaroramivepupa.pdfIn PDF document text
    • http://ladna.pl/user_images/file/34647119493.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/sunevamesazuzodogaluxaje.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_off0000b4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F5 10396 bytes
SHA-256: 8f6f0644362cfe4624c6d446a23ee4bbc4767ef82a1dea760c40315a05597dd1
font_01_sfnt_off0000ccbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 16176 bytes
SHA-256: d59d2ac353731252cf7bc03596df54c6540bcdb9abec68c4b09a3834beafa0b9