Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0ae9293f388fa5…

MALICIOUS

PDF

80.7 KB Created: 2021-08-23 15:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 010c7c1f5f9ea593220d4eb169e3b34f SHA-1: 81768384ec0f6281cc2e9091e4a2a2a636f494a4 SHA-256: db0ae9293f388fa5ccf9313db253855971d122bb2a9f87318ed9e6397bf6e4ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous URLs pointing to compromised websites and disposable hosting. The heuristics indicate it functions as a link farm, likely designed to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=6+cups+in+ml PDF link annotation
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160897055ecb07---76783673943.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107268e47f11---lagekuxulenore.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/39812818728.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/37150913146.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/46688485237.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/58994232730.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/wugujolipivivorovomomuzis.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/b292c49e5033d757b83954c4bb3186d0/viwuduvokojes.pdfIn PDF document text
    • http://synergyproperty.com/images/files/8900210572.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/jusepisofe.pdfIn PDF document text
    • http://madang.eu/f_pds/fck/file/ramabifokizolonax.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/zakususukiwobeka.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/2584c37d8d038c7b2f5b2b0b339021a2/vuwubisuka.pdfIn PDF document text
    • http://sbairs.com/datas/files/82970085441.pdfIn PDF document text
    • https://soechi.com/userfiles/file/ximixirikib.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/1869326217.pdfIn PDF document text
    • http://hotelstrack.com/bot/ckfinder/uf/files/tefusutixilu.pdfIn PDF document text
    • http://storemisr.com/uploads/files/41462007234.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/28422300011.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/mlb6okfjj3tmh053kll6bm9ng3/wubono.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/rereve.pdfIn PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/rokogi.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/dijoforuwonupadew.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/6pli1br8njgbt2ttoqo8b8o5ie/dubitovoxafewa.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a538402f3df---lofalegolakoxivape.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_off0000dbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD8 10092 bytes
SHA-256: 8c6a60c21f36dbc8c39ad6e2812e60a7cecb64e8beda36255f74050a05a2f395
font_01_sfnt_off0000f22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22B 16648 bytes
SHA-256: c081503f11fdb5a237aaa2fc0f1e0f5cb39b726445b32b09b3c173ec68a81850
font_02_sfnt_off00011d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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