Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8006e7fd756320d…

MALICIOUS

PDF

77.0 KB Created: 2021-09-18 20:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1bc3941d2aea8d0f8ab8055762cc8bed SHA-1: b3705ade2e83ea5c7734a35ca8af61fab217db5a SHA-256: d8006e7fd756320de1e9b79f616c7f5fe5cd77dafa1cb7dc7c66d922f23d83f6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or compromised CMS upload storage, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or exploits vulnerabilities, contributing to a phishing or malware distribution attack pattern. The ClamAV detection and ML classifier strongly suggest malicious intent.

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 https://sim2007.com/files/74194437687.pdf In PDF document text
    • https://thietbixanh.net/uploads/files/82850105294.pdfIn PDF document text
    • http://sun-eko.eu/files/file/9947782337.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/76248257299.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138423a49940---94881969383.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136185cb902d---tesawazevavipixi.pdfIn PDF document text
    • https://avela.md/userfiles/file/kapidonavopezenelasone.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1631036014.pdfIn PDF document text
    • http://beverly.kopanramen.com/uploads/files/futofote.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/44305334682.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/ganiwusom.pdfIn PDF document text
    • https://mannoorpally.com/uploads/file/pofuguxaxalazebelewe.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/29592370041.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/sakusuzekukarigijorex.pdfIn PDF document text
    • http://cloverdiamond.com/file/85655797228.pdfIn PDF document text
    • https://primer-spb.ru/files/files/69543319033.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a80c99ec00---joxoferowitobufivif.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/89852d8a7808096dd712e11cdd62fab2/20147358970.pdfIn PDF document text
    • http://hennel.hu/sources/elemek/file/5186493452.pdfIn PDF document text
    • https://sananselmo.com/wysiwygfiles/file/vuburugex.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143de659c8aa---mutumisebikefexode.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac80457b96---74857472811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=minecraft+enchantment+room+designsPDF 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_off0000c712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC712 17812 bytes
SHA-256: 87d9402c0cfd3548c8a1309101ac2c1feebcd07a1c745d1399a89009735d08ea
font_01_sfnt_off0000f579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF579 10868 bytes
SHA-256: 5fde08141871f3c7b4fccf8a428693f66d273213a4c61b6b8371aa985e055a09
font_02_sfnt_off00010e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.