Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dbefe5ddcf08b2…

MALICIOUS

PDF

72.7 KB Created: 2021-09-12 19:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 185e838a1c9923ab4033b35664a1a5d3 SHA-1: 5ef0bcd8e25d60fdc3451cc0869c2f42ccb5a98d SHA-256: e2dbefe5ddcf08b29d326b3e374555b568e91d3d4dc8d5251db6b807e018e389
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file containing embedded JavaScript and numerous external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript and the nature of the linked URLs suggest an attempt to redirect the user to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=what+is+the+depth+of+an+object PDF link annotation
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16133c8d74bfb7---7211838728.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/75308798292.pdfIn PDF document text
    • http://novehorizonty.sk/userfiles/file/senedinixij.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/lejezinetapilalew.pdfIn PDF document text
    • http://dalaichau.com/files/471466391.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/95180676553.pdfIn PDF document text
    • https://vonia.mikludava.lt/images/files/ziwade.pdfIn PDF document text
    • http://potlista.com/file/files/11628275098.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210908155555.pdfIn PDF document text
    • http://metabolit.ru/files/file/fuwegewuguzadukekaro.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/vakaribanurikimazaxaseb.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/fiwarunafefalux.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210912_170909.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/xatisez.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/zotajeveba.pdfPDF link annotation
    • http://bebelino.ru/userfiles/file/91569639511.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/fetapa.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/45812060515.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613971c76a0fe---36364940437.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/50838192664.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/43910334672.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109080404326275.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/tewesesonujalodezipumoket.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/75455516857.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/pitamo.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_off0000ba65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27C 10832 bytes
SHA-256: ea4b48ca0b6890e5b4adc48694a86c066cf9ba48594242ebd17f632df423a9e5
font_02_sfnt_off0000eb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB30 16292 bytes
SHA-256: 4600ee65b501e68c91efb3dfdd6be05b92967d32b020c157df8de095ea9ac365