Malicious PDF — malware analysis report

Static analysis result for SHA-256 22388b5c47f3e53e…

MALICIOUS

PDF

94.1 KB Created: 2021-09-07 20:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d4c69d4155322b4680f9c8f466234d7e SHA-1: 5be0a800c4aabf43f292cc1faa6b57c5532141e0 SHA-256: 22388b5c47f3e53e7f84f8940cec94d5575e256ecebb018543bb5f264c6d1ba9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains a link farm hosted on compromised WordPress sites, likely intended to trick users into downloading a password-protected archive, a common tactic to bypass gateway security. No scripts were extracted, but the presence of embedded URLs and the overall structure suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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
  • 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 http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160776371cfe2a---jesasubugolokivuxiri.pdf In PDF document text
    • http://aimecostruzioni.it/userfiles/files/75813267273.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4c2006cce---7239686838.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/aac9288d2cb7f238f92d42ebf8f9372f/80456319098.pdfIn PDF document text
    • https://tckontrola.hr/files/dadawevanelijozarovoxedan.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210807055613.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/kikupajebajasikirijela.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/3a7ec2956ebd5753f1f1ab2e0c7ce484/86163391347.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/pidofudatagovez.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/65404033903.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce24036185---riluximisusib.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/gogademibowutoler.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/84590240936.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/kesusamoku.pdfIn PDF document text
    • https://wecareprogram.org/images/file/dilix.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16095ad7cbd3d6---83761222232.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b42ebdb81---rotudujarurakuporajona.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160876ed5ab38e---tatizugozodemamudeda.pdfIn PDF document text
    • http://realcomfort.ru/content/upload/file/59397473956.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8416f0a10---taxilazidomiti.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/62454618381.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/wuvesotakokevixusaz.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/318f60be6a085be42cf487d8f2d3e282/sitegoko.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792df120995---95993609991.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/2996d7687043f5a6633ff65acb37dc76/xirofobulapitopokokorus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=makalah+hukum+termodinamika+3+pdfPDF 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_off00010805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10805 18988 bytes
SHA-256: ddc27b3fbdc22045c432bef7d229b90014ad4b7d48499bb5b9c3677a2a84c0a0
font_01_sfnt_off000138bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BD 10952 bytes
SHA-256: 7c6a989f792f376149540b49b0b7cc5e923e6c9553726594cc132def11f66b45
font_02_sfnt_off000151ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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