Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea1079ab9071fada…

MALICIOUS

PDF

99.7 KB Created: 2021-06-25 12:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f4d7f34041bdc2cc1f98bd7a72cf1dd7 SHA-1: 074064b4f1b18b7dc5ec1dbdc931b8b9b12faf60 SHA-256: ea1079ab9071fada61c3407513e4e0dff761fe4afd57caa9e426277001867e3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a phishing and potential malware distribution attack pattern. The document body is heavily obfuscated and unreadable, providing no direct user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://irlanc.ru/uplcv?utm_term=relationship+between+temperature+and+pressure
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/00730be23be5ebf8bee62d1d7e1d6025/35119124358.pdf
    • http://netpost.vn/upload/userfiles/files/9383252976.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/mslcu6crd5inam6ci6sg3ivoga/82957494427.pdf
    • http://insureatkk.com/ckfinder/userfiles/files/juwumixofubelosuviwagiwi.pdf
    • https://digireg.org/upload/jugufimekoviluwivijabaw.pdf
    • http://ei-windykacja.pl/upload/file/16744207835.pdf
    • http://agendatourvietnam.com/hinhanh/file/43091344661.pdf
    • http://laser-piskovani.cz/democms/userfiles/file/20050849146.pdf
    • https://saatyapi.com/upload/ckfinder/files/jesuzaxupi.pdf
    • http://loveperfectionschool.com/upload/file/93455528694.pdf
    • http://fautographie.org/images/userfiles/files/tupinusekusakikafose.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/a013ddn9kljd9040g3d9t8jesm/zuribalalumikem.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607895d558485---fekis.pdf
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/9512801434.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/cdc945e0c857ce38b76d7a0d0bc78c5b/60277394244.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6239c1506---wanajefunagawewumijuza.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f783.bin
e2276a525c6d9969dc41b53f2faed7743a06cd76813d09a06d99ab51d1e54c9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF783 11028 bytes
font_01_sfnt_off000110bb.bin
859edceba9a8d4f9b60500e08e6a56854eb75cc3336f0526555870503ecbe05b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110BB 5280 bytes
font_02_sfnt_off0001236f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1236F 16792 bytes
font_03_sfnt_off00013b80.bin
325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B80 16084 bytes
font_04_sfnt_off000150a8.bin
727e25c034be87b1bab51dcdd654bde84814e7b2a0cd212383acfbefbd5e7680		 pdf-font-stream PDF embedded font (sfnt) at offset 0x150A8 18040 bytes

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