Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c22f75ff6c9d417…

MALICIOUS

PDF

78.8 KB Created: 2021-07-01 00:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c3ed613d00555146ce0268c523a4837 SHA-1: 3b143157b2dd3454d265db69b53c98f68540c6f4 SHA-256: 3c22f75ff6c9d4179b119e151a49c5898177a4b35c7702edc063d3bfa851b0ed
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://fujiya-la.com/uploads/files/63924884227.pdf
    • http://ajk-opakowania.eu/upload/fck/file/kovogatetazelanun.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6521c9565---jagut.pdf
    • http://statewideroofservices.com/clients/b/b8/b825a24af54c157c196cf52173d75bf0/File/xefidusotaxajuxe.pdf
    • https://campermagazine.tv/public/file/lixinasekuzabapumipo.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/p6gunrhk3p8ths119skt92o244/23478207688.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/2c854037f4dc7564d54897656a99cb4d/24449394795.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3dd8c9c2d---naximavotivovadasapexame.pdf
    • https://hospvetcentral.pt/site/upload/file/20651007458.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/d16820dc2af11e8a630f791b315fe67c/jepixi.pdf
    • https://rybczewice.pl/userfiles/file/xuporuzaz.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/634963d744b54ee4b6f8014f9ea9cc50/vijofokopefev.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91fe878e34---59378311543.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/s1dkl1535jciq8bk00cell3672/novezupe.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a549d2e05a3---62757707750.pdf
    • http://alpha-cp.com/userfiles/file/molugozadujugonuzo.pdf
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/mewixewanulem.pdf
    • http://7166867.ru/ckfinder/userfiles/files/19300005957.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160971f357cb78---rodigiruv.pdf
    • http://congtyvima.com/images/Download/56059475928.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/cb84cb6a706f977c9696fd60781f04a8/wonobifavanodulowebipiman.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/441157a9ab9add010e49708f8e6ebe11/nelorebov.pdf
    • https://wsbtitan.com/images/file/37104760639.pdf
    • http://www.celso.org/download/sikajopanoxigenil.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=questions+to+ask+your+boyfriend+flirty
    • 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_off0000d122.bin
efa69ff14b97c131fc75df4cab767e04fe1900da20ec7bb5e066915aecd3c3b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD122 16632 bytes
font_01_sfnt_off0000fc5f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5F 16792 bytes
font_02_sfnt_off00011476.bin
25da6ad8bda29aa3d49788b4943a4750047ed7a3f3827a91fbaf09930f9e9c09
pdf-font-stream PDF embedded font (sfnt) at offset 0x11476 10852 bytes