Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1a4d4a4e4957cd…

MALICIOUS

PDF

70.8 KB Created: 2021-09-25 16:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4dc90a027c5a58b0eb472eed3e95ee2b SHA-1: e7e471fd7cdbbf84e77a4d0b339b9142d9bd3783 SHA-256: 2e1a4d4a4e4957cd867cbf3d3153c283159869a82ae445aadf8775c5ef475154
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF acts as a link farm, directing users to numerous external domains, many of which are unknown or potentially malicious. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it is designed to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://loyalangkorapartment.com/userfiles/file/36130159923.pdf In PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/10704079428.pdfIn PDF document text
    • http://debten.net/UserFiles/File/41366779064.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/74393651736.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/wopitak.pdfIn PDF document text
    • http://nemochem.cn/upload/files/51679408124.pdfIn PDF document text
    • http://archive-2014.humandoc.pl/attachments/file/binagipegazamoxanulef.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/fevireridowogag.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/14180450896.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/miravobilonovatojev.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/87085291423.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138026ad68e2---xubobupakelon.pdfIn PDF document text
    • https://rafautama.com/uploads/file/47746797347.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/fixopepa.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b4942c2b6---rafofuvelerami.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/28787889821.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/ziduzebozerodu.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/52548549173.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/betugilogagubev.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/69156409593.pdfIn PDF document text
    • http://savemaxint.com/files/file/6767009773.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/dikinuvifanonapugu.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/wupigefa.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/73246825162.pdfIn PDF document text
    • https://g-stampo.com/pics/pages/file/2812143357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=iphone+6x+price+in+bangladeshPDF 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_off0000b3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B5 15692 bytes
SHA-256: 8f94784e031072f64bfd25660df52cd715325465e34092edcf7d4f2c90f60aae
font_01_sfnt_off0000dbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 11056 bytes
SHA-256: 23e83461293b873caf01ca888c3f75993979d362ddc453d11e8e00fc95f1edb6