Malicious PDF — malware analysis report

Static analysis result for SHA-256 0389f8610c64762e…

MALICIOUS

PDF

129.5 KB Created: 2021-06-26 01:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: af32594eac700a71ff4026ed6f586c46 SHA-1: bb8eee803952ef307157a929351445ca666fac45 SHA-256: 0389f8610c64762e8882be7083dd7361e742153c77f0399e19a453f5acada744
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing sites through these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://garglob.ru/uplcv?utm_term=charles+taylor+multiculturalism+examining+the+politics+of+recognition PDF link annotation
    • http://refta-bg.com/userfiles/file/1211719341.pdfIn PDF document text
    • http://allasclub.com/campannas/file/48811970536.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/xejudigoluranokusokugim.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e56e374aa---niramota.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d3135eb4f09---texag.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607bba1755970---suluroni.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4636035faf---sefimev.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/zevajonixonasodora.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/9dfed43ecf3b506ca5469dc833e5c0e9/62992251650.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/66931519317.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/lokumufukesaxutufaf.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/nen1r7ijnqr0rvnb9gpsnd6g98/77173395993.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/kefabalozetivab.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/11388128959.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/luvub.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/90459276910.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/17d0a09c46854b264a068aa9e42ae95f/rodaguxafidototanamef.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/d5dq36s8qqlodc97779v9u2g3q/29812667317.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/rezoxuduwikiwokil.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723fefc182f---83583170213.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/nqa9o3hfhg3vu8ecb83bgr9pk5/rivenidoxeriwixedesudefe.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/5ck119qf25fb5km999io1820lm/surejilakujip.pdfIn PDF document text
    • http://nensi.si/upload/file/fozovidab.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/1r2qq6rmp16ram97v66jo9hn84/rixapaxag.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a596d023132---fokanivirukijobewat.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_off000194d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194D5 17736 bytes
SHA-256: 5e45a80a2f189c26698ef11f90b37c0514d2c0503cf0328fed2f4cd80f2e644a
font_01_sfnt_off0001c32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C32A 11272 bytes
SHA-256: 6e1277ad8ed854de230c815fbfe73c6bc3f5da569e40c7198907a449dbdecf28
font_02_sfnt_off0001dd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1