Malicious PDF — malware analysis report

Static analysis result for SHA-256 5beacd432816a6aa…

MALICIOUS

PDF

85.3 KB Created: 2021-07-02 11:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de6f2ab496a5b7501b8402bd92446473 SHA-1: 923628468f91ae021f93703a47bce039dcc06feb SHA-256: 5beacd432816a6aa918c64056cf8650953e35eb838034bc5da3863e6c997572d
156 Risk Score

Malware Insights

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

The PDF document contains a link farm directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fitnessklub-impuls.pl/uploads/assets/file/pupefuwibivanokeli.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66bf4c6ff2---sakak.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/c172460519168e644b2adb661b52b2a1/45974076390.pdf
    • http://52fotki.ru/ckfinder/userfiles/files/meleje.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/of63pie3hpterd850gmrgslim0/92846372731.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f20376acfe---35763320344.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/c58f5723912e6c1dfc746351a0c73b07/satovasepugukisiveraka.pdf
    • https://celebicatering.com/upload/ckfinder/files/19832792517.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6682ea69b4---93960405016.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/f24a62c6d9931ce84e567da608b5b76a/29372301474.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/18cajfjvj0pvt3tjmli67mbdr2/kupupevafafexadar.pdf
    • https://partner-support.net/user_data/userfiles/files/48337914865.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4b9cee008---kokabuk.pdf
    • http://scales-center.com/shop/fck_file/file/vodapemakamusulaj.pdf
    • https://heyratacademy.ir/file/norisowezuvazu.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5ec6bc57f---67094320200.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f18045a42---dirowajijefazipegozok.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf78f6fc0e---nivok.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/33aed3d649e76355e4fc1cead267310a/podifogodufisikajuxomizi.pdf
    • http://alisawedding.com/upload/users/files/xeforidemafilusesenajawa.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a0f78441e---woluvejepine.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+many+quarts+of+oil+does+a+2014+ram+1500+take
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e852.bin
4bcf343cad10667705095e6681c52af0f31d8d906fb14d1ce9d88e454a994d26
pdf-font-stream PDF embedded font (sfnt) at offset 0xE852 16908 bytes
font_01_sfnt_off0001146e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1146E 16792 bytes
font_02_sfnt_off00012c85.bin
3f73aa9b5d803f8423fdb771cc91f55d41ecd857e3f57973126f44be2f614971
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C85 11548 bytes