Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b14d0283e4b2e01…

MALICIOUS

PDF

72.6 KB Created: 2021-10-01 07:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 7de4995192d57268e4c88b30eb4ff067 SHA-1: 63c9ef44f417286dd2ab9a5be9a2dd83261fd257 SHA-256: 6b14d0283e4b2e0145102798480122d642a9e394bb91ccdc1ee9c2a0f74104dd
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier strongly indicates maliciousness. The embedded JavaScript likely serves to redirect the user to one of the linked malicious URLs, potentially for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

Heuristics 7

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://hram-uspeniya.ru/ckfinder/userfiles/files/76757961934.pdf In PDF document text
    • https://n-v-v.dk/userfiles/file/zuxejen.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/pagikapamewivikoxed.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/pulafugozan.pdfIn PDF document text
    • https://valergences.fr/userfiles/file/95976805880.pdfIn PDF document text
    • http://onlineauadms.com/ci/userfiles/files/39505571768.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/wazopafaxiz.pdfIn PDF document text
    • http://ssp.by/var/upload/pezesunudolekuwojurad.pdfIn PDF document text
    • https://amityhr.com/userfiles/file/gorototetazide.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/8795210350.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f950525b31---62091125603.pdfIn PDF document text
    • http://wpchkg.com/upload/image/file/napulatimatosozajer.pdfIn PDF document text
    • https://keepingscore.org/userfiles/file/88776909780.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/921n2s36obqiihfq00jn22bgk1/kesavawomavezaletiza.pdfIn PDF document text
    • https://dnsbp.com/all4help/fckuserfiles/file/3502276551.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/c0f4425fbbc2aefa9d43f57b03e487f6/10815919168.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/noguzudebasoxixopi.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/gutanazexipunup.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/959f740c0b3e7239aa53e485997bf06e/18276988293.pdfIn PDF document text
    • https://koratspring.com/upload/file/sipuverufufub.pdfIn PDF document text
    • https://ltes2.tw-goods.com/UserFiles/files/79340192090.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/tipusafikitofuz.pdfIn PDF document text
    • http://ageofwonders.buka.ru/sadm_files/18625815525.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/vixapuwop.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/giwifozu.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1614f0b9096b0c---kuxukure.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=forza+horizon+3+pc+download+windows+7+32+bitPDF link annotation
    • 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_off0000b6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CB 16532 bytes
SHA-256: 3a6510a1c9eea39d84e6027a842249f2b70d7cd44263b28cafe39fd324f39281
font_01_sfnt_off0000e095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE095 11084 bytes
SHA-256: 18c5e173b213ae73f9522b2fc61aef29d93ce5d35db8245ba2e90728edefa2dd
font_02_sfnt_off0000fa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.