Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ce841cc88a9782…

MALICIOUS

PDF

86.6 KB Created: 2021-07-26 02:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 829b27137012274cd387448e34bc28ce SHA-1: e40850e0779f0b927927e871f6a66f0a445ff03f SHA-256: 07ce841cc88a9782900d5b21a75e451b779145a2cd3534e540684c8f95c800c9
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 compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • 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://cicadit.ro/UserFiles/file/xupowelifotofo.pdf In PDF document text
    • https://nhachoxebus.com/upload/fck/file/popojewufegekozubukovuv.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607700af69785---35339333175.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/lenekebasusijabus.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/wodaji.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e429fde414b---33795261556.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/zojivaraboxoxejo.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/tiviwezinoboronujibi.pdfIn PDF document text
    • https://juegosinflablesarizona.com/files/20572463668.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c63a44ae39---79136309415.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ee5d73757---19608113851.pdfIn PDF document text
    • http://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/31731035050.pdfIn PDF document text
    • https://cargobull.cz/res/file/jefitugotononifudewufoto.pdfIn PDF document text
    • http://tms-operation.com/upload/files/64662939764.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/fijozofo.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/wibawalopolovixuz.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/g2aljceb8vodaa8o2nrhthvvqk/22382571371.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b4bdea508---medozuzi.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/bumunob.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/8042782336.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/3dad21d9d566c728fdb0851d19022250/zujobexuxikafipaji.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a983dd8b722---mimiwefewulez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=why+should+we+hire+you+as+sales+managerPDF 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_off0000ee89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE89 10892 bytes
SHA-256: bf2ed72002995995220423f29fab8342c5b3970e809487564011427d555216d7
font_01_sfnt_off00010756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10756 16804 bytes
SHA-256: 4dfe9610623b9f21488a4182297bfca7b2db55c5b09cca7a71a5e21488bea801
font_02_sfnt_off000132c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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