Malicious PDF — malware analysis report

Static analysis result for SHA-256 200565dfc47c10a7…

MALICIOUS

PDF

86.4 KB Created: 2021-09-13 10:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ca7a387f46ca20e2c6f8b4e3b2db1abf SHA-1: b32d605dbe26e62ad0f5ebf60b43c8dbb03d5a5a SHA-256: 200565dfc47c10a7fb15edebd42c7068b79353d2afaa22c8269f7ea1168c2c2c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The PDF contains numerous embedded URLs pointing to various domains, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • 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://wxbeimei.cn/upload/ckimg/files/202109131323441374.pdf In PDF document text
    • http://iccjsc.vn/images/uploads/files/jodafuduxewedav.pdfIn PDF document text
    • https://aitalk.vn/upload/files/61705197483.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/durapitojuzegilibisi.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/e3e82722849362ec9f0606d71b8bd704/94137118900.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/86271689237.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/kimodikepetagutizeke.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/97127011560.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/tobojinopekazop.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/94111251641.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210904085227.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/13302877077.pdfIn PDF document text
    • https://gallerylingard.com/uploads/file/sevafolojuzolal.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/25434360340.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16130c5547e2ac---18834011110.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/kamufena.pdfIn PDF document text
    • http://snsi.jp/image/news_file/lejajawelutupoz.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/55357213256.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/74504711320.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/55118939166.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/25041129921.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/99212373595.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/wobiwavedekadomedewu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=aptoide+similar+appsPDF 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_off0000ec4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4F 10432 bytes
SHA-256: d85b2ebc689b71ee19c82b7df3ca87d7a04dddd87865ba5227218662cd07cd0c
font_01_sfnt_off000103f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F2 18632 bytes
SHA-256: a9769a7ef9fd9f7e3aa4db5ccfae0ce402441dc788c13659209c648f78495d4b
font_02_sfnt_off00013416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13416 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1