Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fc18b02e0091de…

MALICIOUS

PDF

82.9 KB Created: 2021-09-17 22:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8ac7882dd1e69e43e40efa9040135de8 SHA-1: 44fad192cf95e1489039fbaa2036cf4680fac6fd SHA-256: e7fc18b02e0091de7ea4b0cec0a998a8de844498fa72cb271b05b9fba800dbdd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous URLs, many pointing to compromised or disposable hosting, indicative of a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further support the malicious nature of the file, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 https://bacninhonline.com/webroot/img/files/wozepukuvivo.pdf In PDF document text
    • http://posekatzahradu.cz/files/file/22620401145.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091611020988.pdfIn PDF document text
    • http://modern-pro.ru/files/file/lopoxopugupavugelofak.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/33271053724.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/nanadolapufowilul.pdfIn PDF document text
    • http://falerisztika.hu/tmp/54041257242.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/ripizudesuwuduroj.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/38622675509.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/6128a0acc0db84773e7b447a6954c98b/fevokodamolosawivekoti.pdfIn PDF document text
    • http://progetec.org/userfiles/files/38930217610.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ad740dabf---guvemozazitego.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/buneporat.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/vuloludusuj.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/luvadenemetozez.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021090506314723.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/fajitadaj.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/giwiso.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/porularikusirokax.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/14699970247.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/gekitozexela.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/74670478390.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/garefuvavetasomerojutezo.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/020327422300.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161425846cfc2b---fifabuzozove.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/7406892803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=androiddeki+oyunlar%C4%B1+pc+de+oynamaPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139adef4a6ce---figitutaregukipobe.pdfIn PDF document text
    • 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_off0000db03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB03 20052 bytes
SHA-256: 459796046d22f51e3db9c15e25e955c6987831f27fe95baee4fedd7e3e3b0cd5
font_01_sfnt_off00010a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 10744 bytes
SHA-256: bb543aec0dabc5dafa845763af83a91cb9b80c9baa967f9bac885e56bb9a1e8e
font_02_sfnt_off00012324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12324 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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