Malicious PDF — malware analysis report

Static analysis result for SHA-256 9007cee6f9aee327…

MALICIOUS

PDF

84.0 KB Created: 2021-09-07 15:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 037a67c75b9511ed98f8ae7bf1b5869b SHA-1: 11db960dd08f8502073d0587b426111d6e3baec4 SHA-256: 9007cee6f9aee3275a5e05ba9a7939bd2e80a1e5d6972fc33297d234854402aa
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download' button lure further supports the attack pattern of tricking users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/uplcv?utm_term=download+best+pdf+editor+software PDF link annotation
    • http://sendedianqi.com/upload_fck/file/2021-9-2/20210902151723133397.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ff65b7da3---bibeno.pdfIn PDF document text
    • http://kfbi.ru/content/file/14717775841.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160ddbf4dd80a4---75341215682.pdfPDF link annotation
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd26ccc5700---movonusutobobi.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/82583403419.pdfIn PDF document text
    • https://laserbeautymachine.net/d/files/vexuxovazokuzukomi.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/q63soaa7olih40i033im58ed83/23064303390.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/mumeradova.pdfIn PDF document text
    • http://aweibel.com/Photo/file/86303219272.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/rvvseffk628266gio2o3107ku2/wamarufudonem.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/0c2d61a458e6127f135f4b7398733032/10176713003.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/62484964455.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750fa9c8a50---demozozirixuwojopef.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/tevefaritebe.pdfIn PDF document text
    • http://andrewsexes.org/clients/867461/File/93456719917.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/12078933565.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609b771dac791---tazibebovaxum.pdfIn PDF document text
    • http://kaies.cn/upfiles/21070519553434400578h21x.pdfIn PDF document text
    • http://myepres.com/HotelEstimator/userfiles/file/xazegofofijupadid.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/35867295352.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/4glkbe7cnu0it6coe7hsl79si7/sadazotunulizuwage.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/dikuxunidixewo.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/kidibutuneduzes.pdfIn PDF document text
    • http://minniemleefamilyreunion.com/clients/4/46/4626b253669c69ed517e077132fb6553/File/21285409863.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c263d78107---7514041098.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_off0000e1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A5 10716 bytes
SHA-256: e94ac5203193f668f8fec065fa8aa6bee787997f651dd8b72f9c01f2d592b8a8
font_01_sfnt_off0000fa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 18444 bytes
SHA-256: 95b5b637085735eb35678d2961216502967edfa98ccd2b01e1b6372cadeac5f0
font_02_sfnt_off000129b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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