Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fdd574d1b07a2c0…

MALICIOUS

PDF

82.9 KB Created: 2021-08-16 01:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 937934c40994d407ac2755591a6a992d SHA-1: 69360d6ed991acd61a3fb5e9833e397e8a66dbd8 SHA-256: 1fdd574d1b07a2c0e3fa1f92b68e78a26b84bb95618528f54003b15cf3ff8ab9
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The heuristics indicate the document is a link farm pointing to compromised CMS upload directories and disposable hosting, likely to trick users into downloading a password-protected archive. The embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=nero+burning+2017+serial+number PDF link annotation
    • http://pusheng168.com/uploadfiles/20210630034902.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/negeketiwanuxidif.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/uc8ptb2en71obhovsu3kkaa1r1/21077060416.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e65dbb928b---23936554324.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f41133d4bf5---58870318464.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/23317309633.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c336b8332b3---buvewu.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/gubemu.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d35e473d509---61348089155.pdfPDF link annotation
    • https://ngonluathan.com/images/ckeditor/files/robutomokuputesekus.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/vuwer.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fa50b20b909c44c281d61642eb94bfe6/62696002345.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160827e015bc33---nevasisadilaz.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/8d27a9cfb9b15c1e41d85812668811a8/miruvizijefoxofaloginivu.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/wekomubidugepijufigebej.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5d6c1eee7e---96005733823.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/391d04924a00915b049ca4e35c6f2ada/43336599384.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d070905ecf---botugelafamevozewemopifak.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b24e8b5d2---63458081640.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ce1878c7e---44307079403.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774bc735ff1---xedibudalugudubome.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/badizotimurifakeroviji.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161156c7e643fb---56148128065.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aa1832d5d---38285904872.pdfIn 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_off0000e59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAC 17016 bytes
SHA-256: c51ff351704b9bd763e4e077d90ab5dde3dde74cb956319fc8a935ac64e781d6
font_02_sfnt_off000129d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D2 10912 bytes
SHA-256: e07834ca9481c384117377529c61ecabd5fc9e88980632bde2c4d7e5a0e0e4ae

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