Malicious PDF — malware analysis report

Static analysis result for SHA-256 a884c051faf03f25…

MALICIOUS

PDF

89.4 KB Created: 2021-08-08 20:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b1a91660f2268c2b2607b9442c927acc SHA-1: 1b614d8b11dc8ff0237eec9bb38edc0dacc03a6c SHA-256: a884c051faf03f256e59b8a5d0c9b8191642d80d35e7aa3e7a2238a223c137d7
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. This behavior is indicative of a link farm, often used to manipulate search engine rankings or to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bdb1a8bb05---puxutaxutason.pdf In PDF document text
    • http://langeline.com/ckeditor/upload/files/8873101772.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/gopixurovudojasi.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160fde7752b2f1---xekekuranuwezagi.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/jodegakuloborokowaza.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/nogava.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ac95b60a0d1---77492705595.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/6712483773.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/75450684643.pdfIn PDF document text
    • http://amajyuku.com/files/files/zirubazilevupi.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160e4539e36442---tatiraxobuzatapedefobuwa.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/sorumavumajilupejesibozar.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/poxej.pdfIn PDF document text
    • http://deficanderel.com/clients/6/67/674a09facce11b7629d390eef9534ff9/File/20135296857.pdfIn PDF document text
    • http://akcompany.vn/uploads/userfiles/file/lukasebigup.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6cb6eea11e---wiropejekevede.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/zijojugoguvukofax.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607123a6c2d86---girekikefuwiji.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/aott2pqo52ap074qfmnt051tvd/lunemo.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b115ad8a9---jesudi.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/11602215984.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/tebikoxefisosomug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+do+scorpion+fatality+mk+vs+dcPDF 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_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 19328 bytes
SHA-256: f6f97c49349aa9f38c6e5fa06d7e249c67acaf23b1bcb925dde07b627c079fb5
font_01_sfnt_off0001235c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B73 11000 bytes
SHA-256: a94b970a4e6b766a030cf182262059320bd632f311c6edb75144a80e2b39a2fb

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