Malicious PDF — malware analysis report

Static analysis result for SHA-256 3512a9a0ecfe8326…

MALICIOUS

PDF

69.0 KB Created: 2021-09-25 22:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b699eff42c5195cb0152356206c98423 SHA-1: 0b5d3359cff613e98f615fb832e41a2b01a60226 SHA-256: 3512a9a0ecfe8326cda40df467f6f0ce84726914f79b6b3441686c2926973542
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and numerous URLs pointing to compromised websites, indicating a phishing or malicious content delivery attempt. The 'Image-only document with action trigger' heuristic suggests a common lure where a visual element hides clickable links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pistant.ru/uplcv?utm_term=wrong+turn+full+movie+watch+online PDF link annotation
    • https://tselectromechanical.com/uploads/CKfiles/files/zikekemadevolelozesos.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16141c6d7d0566---segofefesifaja.pdfIn PDF document text
    • http://tdjl.com/uploadfile/file///2021091614281155.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/90368837476.pdfIn PDF document text
    • http://hidropro.hu/upload/marowomaz.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/94104536790.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/23486273267.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/tikadewuvak.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/36082119477.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e68776ffe---jadabobesinefewu.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/wekovajazobu.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/pepamonibuju.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/bevunukivokobuwa.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/32112304256.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/12666169428.pdfIn PDF document text
    • https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/buwubamomuzarakolesibinu.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/gavufarolarerupepotajag.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe9b5d7fc8---xebopudewonajamazaso.pdfIn PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/zojenilab.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/mubanolej.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/favaxaliwesipuzadal.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16143a66a96d4c---87396214225.pdfIn PDF document text
    • https://austarpharma.com/upload/files/44132221034.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/92012233148.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_off0000b1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D9 14348 bytes
SHA-256: 194b5d647941ebc5830a07fa5a312a47cd662a1110bf52ae8e03d18a3e6c76a4
font_02_sfnt_off0000ed00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED00 10860 bytes
SHA-256: 7c3555e046087425de6d54b8a57481b80af94732bbdd6053a9ae3ef1597c3c9d

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