Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d29cf7202736d50…

MALICIOUS

PDF

84.0 KB Created: 2021-09-15 14:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7fbfadd93ae829940ae339a48c79689b SHA-1: 8971c7c3b1990a14008093afe95b94083f49b9bf SHA-256: 7d29cf7202736d5023b2aba1de83811f28072494174cd07e26fd9ed00e29eedc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. This script likely redirects the user to one of the numerous external URLs found in the sample, potentially for phishing or to download a secondary payload. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://cructi.ru/uplcv?utm_term=nokia+maps+on+android PDF link annotation
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161354bc71f995---3404038986.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/2622774925.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/11567363846.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zaruped.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/mimovabudobevanagakek.pdfIn PDF document text
    • https://ocw.tw/uploads/files/32168423205.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/seselojizi.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/bujejako.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/kojapafigekiwefe.pdfIn PDF document text
    • http://jedwines.com/cmsCart/upload/file/26004223384.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/34473558055.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/pukatujubagegazalapifiwu.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/bamusivanavinotox.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/xalirudigumotenazu.pdfIn PDF document text
    • http://szpk.hu/_user/file/48304774791.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210915153449313.pdfIn PDF document text
    • http://kotolantopeni.cz/file/tutawezij.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613568aaf3ea7---pajupusifutuxuvababaduzed.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/keduvada.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/dimobowotilulazetexavila.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/gufosokirigowebuwepuwidex.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/83656010455.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/45849253906.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/91152063370.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_off0000e1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 10344 bytes
SHA-256: 7b1bd524d1d4432a2ec08d2f298f511e66d672a693dde7c49bed59c69c379b80
font_02_sfnt_off00011101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11101 18796 bytes
SHA-256: d76e85707507e03291623d3e3ee0f171b3235624ac6d3be744918a2b40b58eea

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