Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b0f46781e4fc44…

MALICIOUS

PDF

70.9 KB Created: 2021-09-25 11:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8194254a1962cc49fc1656ca3fa5b84d SHA-1: 6bda5472926823742af79c9f1a2f80a07fcbaa9a SHA-256: e0b0f46781e4fc44f90bdcbfc6bacb37be41b13ccf97796a0a26d21c3e65bd9f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or redirection scheme. The presence of external URIs and the overall structure strongly suggest it's part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://falconartistmanagement.com/ckfinder/userfiles/files/92838039749.pdf In PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/7557712970.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/xojemebenedajogimowik.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/80639894492.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/lerabazumifudubit.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/89629b9752a88b5a1b9a36ab89dff618/wedilakuj.pdfIn PDF document text
    • http://nakloboucku.cz/uploaded/file/66260856871.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/19736170269.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/59542242192.pdfIn PDF document text
    • https://webmenuplus.com/images/file/43522134116.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/mavufefejipivukiniri.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614caf9ce2a42---65986079261.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/judejakizimesulanub.pdfIn PDF document text
    • http://ctm.it/userfiles/file/vonufobujojatebapub.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/6963939918.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/92319461825.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/lixanataxob.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/vumegedutesemunu.pdfIn PDF document text
    • https://1000families.eu/userfiles/file/27572976263.pdfIn PDF document text
    • http://air-ned.com/uploads/files/7789573326.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/88296240048.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/8880743577.pdfIn PDF document text
    • https://wsbtitan.com/images/file/tinitekoniteguwinoloza.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/kofefofugaregeduni.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/kurikefujevafevikeju.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/jovorutitareripu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=what%27s+after+trillions+place+valuePDF 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_off0000b39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39F 16252 bytes
SHA-256: ae26bedaf42deec8ebb4e38c67990162deca8c4e424feef10fa42fca8b3980a7
font_01_sfnt_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 10768 bytes
SHA-256: bc247eef91a92663501395ff585917a6e81b1f877ea82e1f94e5e3394090ea5d
font_02_sfnt_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1