Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2cba03df0bdca2…

MALICIOUS

PDF

69.9 KB Created: 2021-09-19 06:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2c9db7d3bc1ea8df4396466228aaa74d SHA-1: 9fa453e07ec9dd6797d1e34d168d819a5b59dc70 SHA-256: 9a2cba03df0bdca2dc2af8ba2477e4d189cb6088ea953a2fa49d0998f9be098a
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of a 'roblox hack menu mobile' URL in the feedproxy suggests a lure for potentially malicious downloads or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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 http://nontaromclinic.com/ckfinder/userfiles/files/rafarazopurotas.pdf In PDF document text
    • https://damsindia.org/admin/uploads/file/87370270769.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/lopuxakof.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/wewameruvidu.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/juruj.pdfIn PDF document text
    • http://huabulaw.com/uploadpic/2021-9/file/2021090705092873499.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/97763044835.pdfIn PDF document text
    • https://adproissy.emailingmanager.com/uploads/editor/file/77032445074.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/suzelimozajetuv.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/oah8r53etn9b0eaoj8apnmeek4/zafigebop.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/7828796163.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141174f9e9a1---gesujakegokezitiwemij.pdfIn PDF document text
    • http://stisk.com/file/35896455459.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/newifibidono.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/werij.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/11564911796.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/walazewexedot.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/90225300309.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/39128097683.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/pidaditajobotijivokele.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614117d65cc19---nunizebuxafusobagufuro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=roblox+hack+menu+mobilePDF 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_off0000b132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB132 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC949 10608 bytes
SHA-256: 02e18b46e29812371207b738e64acbda52633d13dd6e0bd46d89f1b7c7931a23
font_02_sfnt_off0000e152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 16228 bytes
SHA-256: 2dd4a26d51790fec388ef61ea9a9a6f928cc507971d47b3fc45c9e6fb4a36404