Malicious PDF — malware analysis report

Static analysis result for SHA-256 883fe007d06426fa…

MALICIOUS

PDF

82.5 KB Created: 2021-09-05 21:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 605cdbb53572270e0ecaee95d39d97b9 SHA-1: 1985feb42f19edfa63c07fd929b01f58cb37e19a SHA-256: 883fe007d06426fae7f28f80d6a0d782fb9bcfe474eed462c0f4cbb104314950
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous links to external websites, many of which are hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript and link farm strategy are common for luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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://totounited.com/contents/files/norajon.pdf In PDF document text
    • http://105chers.netsociality.com/upload/files/45782354291.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/32058873495.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/goduj.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/luzokulirilanogasori.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901cb3cbc5f---wabejoravepepuxexonukizuz.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/temomoj.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/1146077442.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092956af3240---85830622644.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/10u21gr7onfrc8qmgcq8c2ahn0/87880289295.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/03ba6adbbe68a44d181dea6830bf357e/zilipu.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/90536258254.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/tumagekijemezitizibirurex.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/af6e5192309de30ac88ddb79d8551692/mogej.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/0e5fc7cb338a6b2b09bb7e809d9d157e/funozew.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d86e7e4427---wegodigafepe.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081570f28a3a---latajaxa.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/f9d8035cba40791eebc90e3e1f310d6c/midoj.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/oqdft4h181dr10qv3l8ijfclvk/62466840703.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/89679463237.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/slcqhlpkqokch9l121pqf56gl0/54011658268.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/vosunubufade.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/gagibarodovijaravevukim.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/4uenlqpuuvu908bvrneomgs1lu/51097421562.pdfIn PDF document text
    • http://bavlas.lt/ckfinder/userfiles/files/dunapil.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/nk5572ekmet3np80uqruj3aiti/dibigifiludepevitula.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=daewoo+lacetti+manual+pdfPDF 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_off0000df54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF54 16972 bytes
SHA-256: 4eb46e87860110ee8fafd07d13bd462a609ea725f310e953064b97bec182f80b
font_01_sfnt_off00010b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B77 10700 bytes
SHA-256: 1cc28ccd017078310293b8960788aa6a2836af062436901e1a13fea0058d5294
font_02_sfnt_off00012401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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