Malicious PDF — malware analysis report

Static analysis result for SHA-256 5432f47c084aac27…

MALICIOUS

PDF

156.3 KB Created: 2021-08-06 05:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f9a7411737310a6be033a3f2312c7e1 SHA-1: 0cf7be82fa8ee9d8df3a33646fc528792b5f6a9a SHA-256: 5432f47c084aac272b24443bb0d9e16f252f4d8ad5b4f2fa8e4f9549c18a8fa3
164 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a link farm pointing to multiple external URLs, some hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8680

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a4242d264aeae45df0594bd916936356/27948872519.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/570679c7b38586f9da9316d8fe562483/78276342569.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607922d99edbf---94619302969.pdf
    • http://wagnerfamilyreunion.com/clients/866685/File/kadebajozavenikomigekalep.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/14a35994fb1623d4737a5c63c8bae4eb/patuvow.pdf
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/varuzezojofupijisolinum.pdf
    • http://abacusnancy.com/userfiles/file/60642508043.pdf
    • http://pcccphucvinh.com/upload/files/gufipabubodewoxenujunan.pdf
    • http://logistra.fr/ressource/site-image/files/pupojavinapudifulas.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c583952f607---tadanuzavabesepaniganegik.pdf
    • http://toyotarentcar.net/FileData/ckfinder/files/20210620_90C187B073D7663F.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/48a6203487736303436bbce3ab5938a2/36082769904.pdf
    • https://avvocatoboretti.it/file/fafiwowekavesujob.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/96s7t3gmumi2pij3dflfmc6jb6/bifaj.pdf
    • http://liqaa-lb.com/files/userfiles/files/95460054037.pdf
    • https://bhalakusari.com/uploaded/ckeditors/files/57228365335.pdf
    • https://bmw-zona.ru/uploads/file/juwetaninigodulosixax.pdf
    • https://lecachet.fr/docs/files/97550864465.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a921701e77a---85596324061.pdf
    • http://absolutelyneon.com/userfiles/file/gajizeginum.pdf
    • http://marinapogon.pl/upload/file/64879243799.pdf
    • http://eksan-ltd.com/userfiles/file/2991537154.pdf
    • https://unaizahic.com/Files/files/69058228514.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b77ec08bebb---nupekemitu.pdf
    • https://dansobentre.net/uploads/file/nubawowigojeboworezet.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=pokemon+go+gps+joystick+android+2019
    • http://s292376414.onlinehome.fr/datas/imgmail/file/86263203344.pdf
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/lixutopu.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_off0000f83f.bin
1954ed779dda52fc364415e3044967939789d9717f0432c300a29404ffd47ce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF83F 11608 bytes
font_01_sfnt_off000113c3.bin
756b691c13b983eafa03e47aa9f0b6ad58d5b72d5a208688d70894321573a878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113C3 16344 bytes
font_02_sfnt_off000129ea.bin
d4b4849a8f9bb80cce348e19be6ef8e2debd406692de919c5dfae9a31a6217b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129EA 18932 bytes
font_03_sfnt_off00015a60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A60 16792 bytes
font_04_sfnt_off0001726e.bin
473ae15dabaf6d8b2d299e0564a3018b17a5027b099315e26061311c625c8df0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1726E 96028 bytes

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