Malicious PDF — malware analysis report

Static analysis result for SHA-256 071a7c7e54bddfd0…

MALICIOUS

PDF

91.6 KB Created: 2021-07-03 06:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b45da4944ce498697b7a03b2d51998f SHA-1: 5dc46316e31c6349e047f047151057e0a999fdf1 SHA-256: 071a7c7e54bddfd02a648565e80529c7700c8313d4102da231c8ef9b8129d974
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/ae7ff4c5d0da0c1dbe206ef20eef2015/bajoxiwoxosaliwadux.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/13644258786.pdf
    • https://stopserv.ru/files/file/36881853854.pdf
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/bojojibeg.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ce5e3e6f8---92404069718.pdf
    • http://bagiez.com/userfiles/file/kibeki.pdf
    • http://www.hangmandigital.com/files/file/69344039040.pdf
    • http://high-keenltd.com/userfiles/file/gabapo.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/6e59e770e6b98c3b1abb17f8b6e4268e/68908815340.pdf
    • http://beiwendq.com//data/attachment/file/difedawanadorumororepedan.pdf
    • http://mmdplus.com/userfiles/files/20210604_042229.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/b0qh8ca3utl5slpgrt9ipeshi0/39564179183.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/90d422298d38402c441fdec8e90dca38/32087349011.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/5vroqfk9j1ncvq6ls2ckooq1v5/65666451033.pdf
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/65390176233.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/0cb7cf7a219d1f4790a4529f13143f04/36814144623.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/4d8e1150098b529ed11339d945fb3563/33813246882.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d643b6e9e---lulazir.pdf
    • https://agrilaui.com/userfiles/file/parozedexej.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607e23e2b9cac---65451039385.pdf
    • http://barcabianca.eu/upload/file/zuwokuguwigarod.pdf
    • https://fceresources.com/ckfinder/userfiles/files/93381628166.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfae23e8bc2---72991800368.pdf
    • http://araonline.hu/uploads/file/71246020200.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/eb1b661154b9eb2cd9e72959a441f014/bugesumujofejowukilo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=response+rejection+email+after+interview
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaed.bin
6302fc09c0329ecb75a96de83ccaa95cde2294ea76317f35fdf8ffb96b20cf85
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAED 10968 bytes
font_01_sfnt_off0001046d.bin
648b01d4f5de638b22d14447187e48d18c499ee7ee3036d110fbd58c9acac04c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1046D 17012 bytes
font_02_sfnt_off000130d4.bin
7bb558c053dc4e043e6ec2b99395c9865f054a5c24d8cc6c1cc1224a35179b35
pdf-font-stream PDF embedded font (sfnt) at offset 0x130D4 16892 bytes
font_03_sfnt_off00014893.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14893 16792 bytes