Malicious PDF — malware analysis report

Static analysis result for SHA-256 7346f868d3d9e59b…

MALICIOUS

PDF

68.7 KB Created: 2021-10-05 14:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5128d3885bb6e74937838c72051c6a25 SHA-1: 11d01885548c1c4acbfaa2f411b788f81b06f91f SHA-256: 7346f868d3d9e59b4bbb64dcb2ae662081b48aa3087ada79a7bd16c16a44e010
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=tips+to+have+a+flat+tummy PDF link annotation
    • http://mirai-kankyo.com/userfiles/files/6699340636.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/d162cb4eb615941d4c46d4a1b67c2e63/16052017451.pdfIn PDF document text
    • http://wych123.com/upload/files/54765952274.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/fovadufawedoja.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/fibalurasilupatedimu.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/3e2bf960ee317d937da5e335ab951946/jaxawigumovosol.pdfIn PDF document text
    • http://ridendo.cz/files/file/pepezofovuxizadu.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/genotureguxasonidabek.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/85324744031.pdfIn PDF document text
    • https://limadelimon.com/images/file/52461288239.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/60427768837.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/48584170742.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16135828418baa---sozivakiwarebogo.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/49646778910.pdfIn PDF document text
    • http://unionasset.net/file_upload/spaw_upload/file/20210901234020.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/9937790758.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffa548ba7f---pudinitazuwosar.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/meah6heukh7hu5lubsfspeaq6m/navagirenu.pdfIn PDF document text
    • https://bursac.net/userfiles/file/lamomujonu.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/voremudutakejokusogodap.pdfIn PDF document text
    • http://snft.ro/media/file/6279054803.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/kenexoxivilazix.pdfIn PDF document text
    • http://gdgom.com/upload/file/210905031022342854fzavlgrdkyki.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/mawikemabi.pdfIn PDF document text
    • http://cargologicru.com/sadm_files/62348489378.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/kofegekabebov.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_off0000b1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A2 14248 bytes
SHA-256: 75a006e21afed7a1e0b52134e96f27aedc9665edeb89dddb7a7a6d09fe0c0166
font_01_sfnt_off0000d4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 10660 bytes
SHA-256: 8c1511de20b7e518cb2fc9bc1a262b52a2f7ba62abbccc8aaae606cea5ce6a66