Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8760f70df7adad…

MALICIOUS

PDF

80.7 KB Created: 2021-09-16 21:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f4a99d2b13338dff7b2532a445f17703 SHA-1: e04dadffe11eba75b8a6d39a6ec10e763b6ed4da SHA-256: 1e8760f70df7adadeca2685ef223d8995f116a11608fb9adbeb0dff0071d7739
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URLs and link farm heuristics suggest a phishing or malware distribution scheme, likely attempting to trick users into downloading further malicious content. The presence of multiple links to compromised CMS upload storage and disposable hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://philabc.ru/uplcv?utm_term=download+latest+windows+10+iso PDF link annotation
    • http://dogomanhnghia.com/uploads/files/92271208173.pdfIn PDF document text
    • http://imoroz.by/upload/file/bepireguronamatugaj.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614272206e83b---padinuv.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/tajarusasap.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/tuwarolafepelof.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/wamazabitajanamiradip.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/fuxigegopo.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/1c330ec1d233e6f04c302336708fd1b3/wisowi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0f6401b3f---zubituvixajadesowakojof.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/52068978259.pdfIn PDF document text
    • https://amgaa.org/temp/files/55014649865.pdfIn PDF document text
    • https://promtour-rural.ro/userfiles/file/81833892165.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/kupemunifaloroji.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/kuxamajufulonuzejawanobu.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/8240745497.pdfIn PDF document text
    • http://recviem.ru/img/upload/tawigarikuwujedoseniximom.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/i588n1bmtpvi07nuav15kdjcue/16173123054.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/58284140160.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8e089pcfoa4nn82g4inck35u13/pilumimuvekapa.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/41445243585.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/nawavekobugida.pdfIn PDF document text
    • http://yfatc.com/userfiles/file/18426014172.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/wogokiwuxigekadivisisomiv.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_off0000db05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF317 16300 bytes
SHA-256: 19a802daa3ccef8ef22a0612ebfcdf2bf548fd64a3be092af3228d5ce9c084e0
font_02_sfnt_off00011d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D29 10400 bytes
SHA-256: ed1512a1ae55f26608fe9f0ecfb5a9a34ebcd0007f8ed7ecd97f0a78a55abfab

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