Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0bdafe1e5d2dbf…

MALICIOUS

PDF

90.3 KB Created: 2021-06-30 07:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea64f1f636e9b5d53f778d0cb3d4f203 SHA-1: 72a73874b5288d2c87232909509840eb47f6171e SHA-256: 0a0bdafe1e5d2dbfdf4e62f2a3bd3ff60554c8561b2c4339ccff274b218f1be6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which are disguised as file uploads and use UTM parameters to track user interactions. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://medvor.ru/uplcv?utm_term=autocad+electrical+2021+crack
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf00d4b7a02---38044184908.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16099766247821---jofomibafutiwebom.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/dc253d89fa4ddeb128674b6ec74777d4/23747819686.pdf
    • https://rugsinc.in/UserFiles/files/zitokotufusetu.pdf
    • http://dentalclinicbangalore.com/uploads/tixalolifuju.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/2d87eee6679a58047c677149b0a16258/kirufodokotexa.pdf
    • http://alituncer.com/userfiles/file/15758467219.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/95c526db178402ad54e50d8d8045e854/zidejawuluzogekavugaguje.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f980ed6748---pudirebi.pdf
    • http://gymostrov.org/gymostrov/userfiles/file/68907288690.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cdbcdf346---53627498957.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725433be5b4---9103600069.pdf
    • https://immobilgold.com/file/muzabagepenogagilu.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2c452897f---muwovetaxen.pdf
    • http://taxilitomerice.cz/ckfinder/userfiles/files/xofuxige.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16080f61756b93---munobogubazoxuj.pdf
    • https://equinox-e.com/upload/files/pevolapejonuvexoxajilum.pdf
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/suxiruselesawebos.pdf
    • https://bangprice.combangprice.com/beta/cms_image/file/toturowigojepokis.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/0dprtglavqg1st5ff97th1stea/32754089273.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cd04715c0---10934695752.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_off0000ed02.bin
e62932d47d9f21b6a5b3374606cbe99c461d7b43af07daa37a2fc07d87969bd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xED02 30676 bytes
font_01_sfnt_off00012a3c.bin
a812b0f967ad48d5002358d05da3ea8eef70e1079d9ce8ab88e64b2b936e5b97
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3C 10556 bytes
font_02_sfnt_off00014290.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14290 16792 bytes