Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ebeb045f563cb07…

MALICIOUS

PDF

83.9 KB Created: 2021-09-05 19:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 01769ff1d528a610666115ed2b04cc1e SHA-1: 0aad929668342d1c52ae2841ce78ccc98a442194 SHA-256: 3ebeb045f563cb0711f054d29db9273b9324840a9480d9dfc0cb6af3876a10ae
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal that the PDF is part of a link farm hosted on compromised WordPress sites, likely designed to trick users into downloading further malicious content. The presence of a 'download button' lure reinforces this phishing-like attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/ggalrs46t2ufp12dngdirfq276/36039947566.pdf In PDF document text
    • http://the-bom.kr/upfile/files/fudipeluguj.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b66ca9ec938---70048346222.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7af756852---60264939708.pdfIn PDF document text
    • http://grupophi.es/uploads/files/92900074361.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d56ea0a398---bemijixowepini.pdfIn PDF document text
    • http://tatnhapkhau.com/ckfinder/userfiles/files/64867848715.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088630f70781---58833853133.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/nifexiwepulinixuzoguvik.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160fe825334cf5---pezegilozetazufituwirip.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/jadirenetevivuxepo.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/69009463817.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/838360c2048ac6dad7a678bcd06cb65b/87195157150.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/af33gffp9qlieoo2r2vt49lpd0/wotojilevuturef.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/45dd46f33a5838bc1f20538c8032cc39/jikalezosileruxo.pdfIn PDF document text
    • https://lazerom.pro/media/file/jolujamekakawafifo.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/kijudutibulena.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128aebc5a30b---bopagikimuber.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/24049511760.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/20337272173.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/lazimezopatexixagukuxive.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec13d5e7fa---lujasedo.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/54811283072.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/58072120112.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5791de1ab2---83909157692.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610b1d5b6a009---xetipabovimofutiwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=wings+of+fire+pdf+book+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_off0000e0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 10888 bytes
SHA-256: 3c7d9c2cf2f98950d5f6f6d061d23030558c003e69f7cbdeb588fe1767de13ac
font_01_sfnt_off0000f98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A0 18620 bytes
SHA-256: a84306a9bbf841901748140c38475d664df1a4a1ff0f1b9c64a361ba994f6adf