Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e4240b552430bd…

MALICIOUS

PDF

79.7 KB Created: 2021-09-05 20:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e0c3895e7250ed48cf1de839e885294d SHA-1: 6a1f85e6594bc6f3faa8414d7c0fd0207fffbdc7 SHA-256: 47e4240b552430bda54c311fe37f91c25aac6d7280cf48d5b8c737288070843a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=penyakit+genetik+pada+manusia+pdf PDF link annotation
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858bc1aa1fc---najamagelavadoluvokilusa.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/87285982758.pdfIn PDF document text
    • https://htchninc.com/d/files/jijexufobegobomatipavul.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/26588596155.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/guzudux.pdfIn PDF document text
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/12491347951.pdfIn PDF document text
    • http://wenxuezj.com/images/File/97413524344.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/aa89c0d0e39d5614bb29d84134f616a3/95098620287.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/boxegajela.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/3d7216c5af9e5ac26840133bcce4f28c/20784414610.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/8521359182.pdfIn PDF document text
    • http://tsmsaldature.it/userfiles/files/33252503731.pdfIn PDF document text
    • http://sushibelovo.ru/files/lepifofegumusiwavurotir.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16078c470d237a---fuvijedekutanejor.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210719211701.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/bikotoxenipuv.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/afvr39g766dfaqa0jafbk9b6g6/sakojegojagomexibeboj.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/sizerigike.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/raduwot.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/1650165bd6cdb86c64a7d054ef75cfef/wajopege.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/75108637754.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/p0fvt9bjtdrutl5467okut3ti6/22695217052.pdfIn PDF document text
    • http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/39945936420.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3879d5eea---zabefizuji.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_off0000d5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E3 16132 bytes
SHA-256: c25d08d6cd492d1de472689e5fcf67d6dd4891ea48a631a2454ea15f8f8a503c
font_01_sfnt_off0000fffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 10880 bytes
SHA-256: c65d2ae60a3c2b651125187cb49b7976c9b95f7c211cc2a1dd21f357a5ebc6b6
font_02_sfnt_off00011900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11900 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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