Malicious PDF — malware analysis report

Static analysis result for SHA-256 df75fb6c511b7dfe…

MALICIOUS

PDF

108.8 KB Created: 2021-07-06 03:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9171e5e5ad81cacbef514ba3ac4c421f SHA-1: b972c2060cf9f9519b8d15abbf50740cec8ac03c SHA-256: df75fb6c511b7dfee5214425a68abc8d048767b2673c83489b84001df5d441c1
156 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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://spreewaldatelier.de/img/editor/file/letipabetobavoxojat.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160d72ab4cf773---kilebe.pdf
    • http://halmar.info/userfiles/file/zuxunevobusoz.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabc15045c2---36433991740.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609253a4430bc---44397949737.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/38afb5c7fe218f2c30355db958f297d1/42518150805.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/qvk27349ecpio9k7jh05k79hj1/66654946854.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/c329932695e8878537cf4d7d15c65767/torabusixeju.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/3m5pf43lc43lkrlf13d96a05b7/89258062600.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b93a8de37---nozekesamuxogewedenutoz.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad693b1a66d---bedujuxerokirobo.pdf
    • http://wmc21.com/ckupload/files/zonixodokofujodala.pdf
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/supufoxu.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077910b72e4d---disetipewavuvowapawupokaj.pdf
    • http://seoulsquare.com/userfiles/file/76826880960.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf7d70a06d---paligijegulexozaw.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/7dcd5b6cba501063921e9a617c38f8d8/xapimidudisox.pdf
    • http://aeronautike.com/userfiles/file/kevabasulipulalaji.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfb5e95e6c---jafoliv.pdf
    • http://arcomproltd.com/userfiles/file/mefar.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d992b37fc2---29917387743.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=hermaphrodite+meaning+in+english
    • 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_off0000f231.bin
4434c9b920fe9e17892e1a72eed8ba78ffa8368a13e124069311b2948a93d591		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 31140 bytes
font_01_sfnt_off00013e30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E30 16792 bytes
font_02_sfnt_off00015647.bin
30fcf12a638b945a53d3ae5f386b41d1a1d431ba9db437da7ea7a122f6d6c6f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15647 10828 bytes
font_03_sfnt_off00016ebd.bin
d5c081d5703513af95185fc9e301ce71c30d84a758aef48339c502f9d08676b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16EBD 5984 bytes
font_04_sfnt_off0001840a.bin
2b5b3edadb206678b3541c69c537fb17b68f30b5fda69942e712a3ee2a09595b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1840A 19380 bytes

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