Malicious PDF — malware analysis report

Static analysis result for SHA-256 e694a2841d871b6d…

MALICIOUS

PDF

97.6 KB Created: 2021-08-17 17:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5a420225d4069384fc27a13797750de7 SHA-1: 868a1f554a9e55f931ccf0804bd9d75d7a9188ce SHA-256: e694a2841d871b6d3d303957dee2478cee7e1b01ce265c15a2e6b9daf2ed0104
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external links, many pointing to compromised websites. The heuristic firings indicate it functions as a link farm, likely intended to redirect users to phishing sites or download further malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • 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://infrive.ru/uplcv?utm_term=can+you+do+your+own+post+nuptial+agreement PDF link annotation
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cde7d79f733---38746603374.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/58881570623.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9f5cc0f0d---situperetoseki.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/ponasipufafili.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f52ae6a2a88---48282425380.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/80668479781.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/mizinuguwewemi.pdfIn PDF document text
    • http://vonkoenigsmund.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca49b2a47e---xafekuwu.pdfIn PDF document text
    • http://tecumseh1962.com/clients/85183/File/pilijasapu.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/81886521780.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/xexajevaliribuxozanawawul.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/9p5tcsj68pag8c73273m4552bs/jiwedekisusajixukiwixoso.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/43230091146.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/98294318827.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/88166171680.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/genesexejimulimaz.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f09110cb37---63788251637.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/sekojiwuxugupufizemexuze.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/41445562614.pdfIn PDF document text
    • http://crm333.com/documentos/file/wotaxizorusige.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/fowomibiseboratalumanewi.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/34666159737.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACD 11064 bytes
SHA-256: 871d07ae8b9dcc29d5c7f7fb659ecb09686c211b113dd0d12c9d73f024453e91
font_02_sfnt_off00013471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13471 16948 bytes
SHA-256: d1943f0e852f161f24309ca9812bda1ed4e3792d51041bb193a9b7fab117a117
font_03_sfnt_off0001606e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1606E 16088 bytes
SHA-256: 21ff46de98f0902b53a5c0c946916a1dd4551bbaa4204463728281c4bc54dda8

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