Malicious PDF — malware analysis report

Static analysis result for SHA-256 1199a8ea7ba90c38…

MALICIOUS

PDF

82.9 KB Created: 2021-08-22 01:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6073d706f12aa0ad3a84327ed107db3d SHA-1: 8fa83f3c074c7a19134cf4c766e356eaec0dbbee SHA-256: 1199a8ea7ba90c381dc6865c78cbf583a13968e3c40832c367faef5271c9d4e7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://drafthe.ru/uplcv?utm_term=j+geils+band+songs+youtube
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e09f1dec8b---32660055466.pdf
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70925015394.pdf
    • https://alsultantrading.ae/userfiles/files/jagodusuwoni.pdf
    • http://terralis.eu/catalogue_dynamique/file/48227876503.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/27kgfr9nuntothd9ceocp07mts/kajowiwezibetorebizab.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/n7h6p7mgnavi4knn69126d8593/94026992185.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1a3c65a8f---sevoruwaja.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2c1f54627ab2bcbf574b4dd0afa74bd3/52327556306.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c3ce90119---18819764201.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/642b3540666f6752bfb454f93e05e21a/99043776695.pdf
    • http://a-mega.ua/images/uploads/file/60797645358.pdf
    • https://curryleafharleysvillepa.com/hang/userfiles/files/lobimoladejovigupabex.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/ca99f71c18222af7863b4101c0741330/sixenofinidubofakadujoba.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/2002bad4448538249d8ac989ed506f0b/41539972404.pdf
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/dbqi0sukujg75gsgvstuqkpnd9/52220464843.pdf
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755a6c60ba6---12029175894.pdf
    • http://bebelino.ru/userfiles/file/nefadal.pdf
    • http://dabaizhongxue.com/upload_fck/file/2021-5-21/20210521052922725763.pdf
    • http://vendsol.com/userfiles/file/juson.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/130c82c4d1f6a9e228ceef3bc485ba13/56890512691.pdf
    • https://terminarz.online/kosmetyczka/krakow/files/budak.pdf
    • http://ecandrychow.pl/Image/files/bixew.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d92d593d4a56be8f28174150f8f2e852/verogaleturidozu.pdf
    • https://psychotherapie-coeppicus.ch/userfiles/files/xasazutat.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/6ed0d559b741c0655f802213b89e3fb7/85585543587.pdf
    • http://bavlas.lt/ckfinder/userfiles/files/27218183013.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df2b.bin
258cc7d9fd49c8ff1eae6e488c3d3dbeaa15863e517b6aa6fdb98b725afffac8
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2B 10668 bytes
font_01_sfnt_off0000f78b.bin
19200b4e8d29fd203ca6cca97d7e0e19add7d494366cf964aa1fdf18eebec1a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF78B 17844 bytes
font_02_sfnt_off000125a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125A1 16792 bytes