Malicious PDF — malware analysis report

Static analysis result for SHA-256 246db93fe1e2ee62…

MALICIOUS

PDF

95.6 KB Created: 2021-08-18 22:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d12b510ea38129deb9d37da980a91f7f SHA-1: 74c0085e2031b1be7b9fb487834a77ba1bc1fcd9 SHA-256: 246db93fe1e2ee62cdaf7236cf55b4a04c1508e1a8ef533b4588f58711d53f6b
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics and ClamAV as malicious, specifically indicating a phishing or trojan threat. The document contains numerous links pointing to compromised WordPress sites and link farms, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of external URIs and compromised CMS upload links strongly indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://laborke.ru/uplcv?utm_term=how+to+read+digital+allegro+water+meter PDF link annotation
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce4e8e69da---74830497973.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/43l7vm8h92pfhb1eqqbi6uqajb/vizaxogekijibitir.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/6177750319.pdfIn PDF document text
    • https://areicon.com/images/file/demozowarozumonite.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ea16396a78b267cc9f07e540b6896907/rezajevarer.pdfIn PDF document text
    • http://flirdining.com/uploads/files/naferupapusidafevesilu.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/niwolipanumamivafinok.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab77b68dcdc---zeleranaliwozom.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/rozur.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1624406479.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/50787926424.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/berobafabopetavitanafaxi.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/882d7kfub979t2d4ms9dl95p8t/jurodinekuxipuwiteponaj.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816596d78a1---komekazizabixugunepaguro.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/tivez.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/2930915527.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e05e3566---62517557377.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160805b3c4d2b7---70700462520.pdfIn PDF document text
    • https://vieclambaohiem24h.com/upload/files/kofijatetidesubukafo.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/mq9tnprjtn8s77vf9mp70ak2mk/61944245617.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/kodasobibanetu.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/273926883552801a543219e7dcc3ecfe/nuzebozu.pdfIn PDF document text
    • http://uci.ir/userfiles/file/70069350612.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16085d88c958e2---74384736767.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/67123783622.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11349 17024 bytes
SHA-256: 6786f765a8d46a1300e8265fd1e6c5abb26398efa31d5a8638ebf07872a34c20
font_01_sfnt_off00013fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD1 10396 bytes
SHA-256: b4731b3473ea32727f018d928e6f3fe5cf4b54729763c435657ce0f6dfc2666e
font_02_sfnt_off00015721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15721 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1