Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cab0f75ded3885c…

MALICIOUS

PDF

84.9 KB Created: 2021-08-14 21:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 03d59ade73e45e5753dc404a7f6bf48a SHA-1: 0b2984d8660ba01c74407f65a95d1a4c77add94f SHA-256: 7cab0f75ded3885cb232a2e09d0f929986ef61421ac15728b120925b453af2e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://coretry.ru/uplcv?utm_term=php+basic+programs+examples+pdf PDF link annotation
    • https://calmoinc.com/upload/editor/file/24778561246.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/9klkqmc7rooq36uf77mkh8h48l/98588457897.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6642ae3d49---notavax.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/dapur.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/aaqeh4n4buuptgv5uln2qcfoe4/7379099901.pdfIn PDF document text
    • https://proxus.nl/file/penix.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d19f8ce38bac2ab174c2eb18f67fc587/fawoles.pdfIn PDF document text
    • http://thefjordbaklawfirm.com/clients/876731/File/rirum.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abc5d0f3795---48074838235.pdfIn PDF document text
    • http://falerisztika.hu/tmp/42021276840.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160978b1952a4f---45505970677.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/11446076523.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/2mkkdne357njjn9dhfhvu64b9p/28830574424.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/5b666cf01fa33a2b1af0fbe2d50a83f3/83576373824.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/70802357787.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/3379565158.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/67805367833.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a737810db16---85978740958.pdfIn PDF document text
    • https://threadworx.com/thread/admin/uploads/file/vadazox.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/70770051543.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/nojexajeta.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210629211230701976.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/51869599385.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_off0000e724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE724 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3B 11108 bytes
SHA-256: 991712d4db64e702b3b56c8460173371c79ec5d5a3678f9c2ec6924338e5fde0
font_02_sfnt_off000118bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BB 16696 bytes
SHA-256: 9887296a7d60ae128b6fe3fbc359cb9962ebdb79953b964c89a1e6d9c3106fce

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