Malicious PDF — malware analysis report

Static analysis result for SHA-256 320d6f3e30a46785…

MALICIOUS

PDF

79.1 KB Created: 2021-09-20 06:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 52fbe2e302dbfcc6d98e18b1fc666fde SHA-1: 44e64c25468b139413fdd080c9540fe98e4f5cb4 SHA-256: 320d6f3e30a46785188c003132569267e57c6419842d7e4d1fdf1e2661bb5889
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate malformed streams and a link farm structure, with many URLs hosted on potentially compromised or disposable domains. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vimovelatavalitide.pdf In PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/9202585406.pdfIn PDF document text
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/pudun.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/zazelilijegiko.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/77142554593.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/6501040056.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/58158164757.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210911112609.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146decd42917---60389178860.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/selovefiwuxaxurudojofito.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/83376618505.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/bobexojokozitum.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/dikigixoxidugemup.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/947a31338bcf8f2fa3ea35864245404f/kozapirozak.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/77668590623.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/d9e7019cdaed4cef72b844a71378a431/kedafofodisogadutunewika.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161376532714ae---gilaxenagurebafunaxumo.pdfIn PDF document text
    • http://ippon.lv/uploads/File/gudusunutamabulizonifade.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-6/20210906190134807874.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16132957749256---gobupun.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/98063382449.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/46421279019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=sweet+selfie+2021+apk+downloadPDF 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_off0000d2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACE 10936 bytes
SHA-256: 3da84a1409f8456537306e1732bba1ad99e093d2cd1e1d2ef51d160e69009f1d
font_02_sfnt_off00010466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10466 16836 bytes
SHA-256: a6baa4c84af2b3a7d6ffe5dae4b0fa0f47c285bf8b494b099a252e7efc46ae4d

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