Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08a921566c2143a…

MALICIOUS

PDF

86.1 KB Created: 2021-09-19 19:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e16c01b0494256e7612a8bc98cff31a4 SHA-1: e22822f3760a43abcfde10feccf017f58d403b17 SHA-256: a08a921566c2143a388290b464b6395854a0e5af7e0e1221494ab1c0bcef8a02
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting, suggesting a link farm designed to redirect users. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security and deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://crysiq.ru/uplcv?utm_term=android+remove+pin PDF link annotation
    • http://z500.si/files/62710770816.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16140f870793ca---58492304010.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/85782578398.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/56516270401.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/6aff4d16e3a594af566faf1306f09142/99841640896.pdfIn PDF document text
    • https://dpengineerindia.com/admin/userfiles/file/82607884662.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/73387245136.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/161359475ee0fd---82003583817.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329868c39c8---19657732653.pdfIn PDF document text
    • http://landpas.pl/upload/file/76263944255.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/vikilaperosokuxizinikuxa.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/vubipeladisakig.pdfIn PDF document text
    • http://labradory.pl/file/89961389649.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/42097771885.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/45103323103.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///mututufapufogoxujuwu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c7377cc11---bivodusukabaxipewexuji.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-13/20210913141732858675.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/13323816647.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/fexizivazov.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/xojufololupunekaju.pdfIn PDF document text
    • https://lasanisports.com/files/kuzulik.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/7d912e4fb19dace4c46a3b9ee5b692b4/51732843334.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1614484cba66d2---lavotoji.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/20499561u06icqj67i7tco8o0o/gugigimulinutorixigik.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_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 10128 bytes
SHA-256: 3209c38972be325e007f5f25f189660503c6457e61e958bc0ec49b3267fd1a17
font_01_sfnt_off00010316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10316 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B28 18192 bytes
SHA-256: f3f13e144d1a61c0168d0a25d6c78d30738c7f8595a788382e506c6dd3abaa19

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