Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb5deb83d59b91a…

MALICIOUS

PDF

123.4 KB Created: 2021-07-08 22:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4440b0ea6f21fe61bad5947340f9a18e SHA-1: a99753ce19ea1ba0746ae9795fb255b6806f4966 SHA-256: 9bb5deb83d59b91adff19a656c9c382f9e8d222a6c685eefa7a09e146d153eb0
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://allseasonsart.com/uploads/fck_uploads/file/sejomurijebeborafofu.pdf In PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/f41a4b15b6b3a01ff304a6b6b311c6a2/84920853775.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743289c9aed---xorizan.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/delilotojofunegipokezu.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/63549142701.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/1312572921.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/19847392666.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b997cab3959---96116652439.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/80936413510.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/5170751697.pdfIn PDF document text
    • http://balone.net/_upload/file///58129431521.pdfIn PDF document text
    • http://prestizhstroycompany.ru/SITE/files/editor/file/ropajuduruso.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/e538591d7700c9925ae8940420b7d1b9/japipuvigubutotepun.pdfIn PDF document text
    • http://abnicum.com/files/file/zudulekumebu.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210624150115112.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1288145d3---buzitamo.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160becb1d02f81---dudowamaziloxe.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/393109533.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/99676996220.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/67350736625.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080954352fa6---40137579449.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/jabinoj.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/88240700914.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/acfa80d16af3aa9ec7b810f0a41b4f37/nawuxawutimeputaxibasilo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=squid%27s+day+off+full+episodePDF 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_off00017ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EC0 18264 bytes
SHA-256: 85090efa4fdad969a6f6314f1e638767d4165cba3ccecf9d8208976659acfb13
font_01_sfnt_off0001af75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF75 10660 bytes
SHA-256: d6402f4d38c7c4aadc91e87947d3c4972e41dddd16d8ed89e75dcb441ddc4f3b
font_02_sfnt_off0001c7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1