Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df189d98c31459a…

MALICIOUS

PDF

83.0 KB Created: 2021-09-24 03:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 157d24cf0c816777213eea75590862e1 SHA-1: a8bf0e86d8c7de52b16165b236efb106a61c8394 SHA-256: 5df189d98c31459aa37e98fac2df0521bbf47375157170412432c6ff87f9cd96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to other PDF files hosted on various domains, some of which are associated with compromised CMS uploads or disposable hosting. This pattern suggests an attempt to lure users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/98657581785.pdf In PDF document text
    • http://huile-de-nigelle.info/userfiles/file/rowideruriwopobur.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/15893171586145cb872352a.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/biberaluw.pdfIn PDF document text
    • http://jfe.hk/userfiles/xebezebepevajiwowazowi.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/90325583655.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/lemowevodoganusuno.pdfIn PDF document text
    • https://lecachet.fr/docs/files/vifijepuzezetinubojizitiz.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/suxinitumijunosetado.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/tadifobuginowe.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/46136601079.pdfIn PDF document text
    • http://togul.org/sites/default/files/file/jojulaxuno.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/saruluxute.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/28975536030.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/98171996293.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/9627880356.pdfIn PDF document text
    • http://nppgursaraijhansi.in/ckfinder/userfiles/files/13230770429.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7d740602a---wawunot.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/d2a200b41d260940d94f9c3ac1bfd457/suliwipurafegezor.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/3767309326135d8242dc5c.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/wopaforoburovakexo.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///xuxelesebizumomifizat.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/6744275723.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/wusuzudano.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/58e6f2c8d817e6a3b047caa74af368e9/pigilumaxarato.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/49326823747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=gta+in+ppsspp+free+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_off0000e0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 17132 bytes
SHA-256: eea3f1c6d7f112a0b8c9ff7874b0492f1c3102e074597cf192ad0994c5d8dba0
font_02_sfnt_off000125a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A3 10616 bytes
SHA-256: 79214efb7f986b65c66cec636e4cc9d149ffd89b8fce1086e4f4a2297548627c

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