Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9c811359da3164…

MALICIOUS

PDF

85.9 KB Created: 2021-09-02 06:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f500c2306f4a6a073f273edfa12bbe83 SHA-1: faabd1dd68b5bb81ed76a115b1ea601ac9832d72 SHA-256: cb9c811359da316411dcec972b46a72d8ca122f7b1f426b55dcaa28583ad9abf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model with high confidence. It contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to deliver phishing lures or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://ketchas.ru/uplcv?utm_term=the+power+of+i+am+pdf PDF link annotation
    • http://xz-brand.com/ckfinder/userfiles/files/55650029314.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/85941465367.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/26d29ef75308f0beca0194feaaad7527/29316781240.pdfIn PDF document text
    • https://x-software.cz/data/file/70395395720.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/monepiwiromifinas.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/90785491986.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/56042664536.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/56523871877.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/m6o8i78ge83p44jankj47gmv1v/vipefonejibufejolabetizof.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160983bb502308---xefofinubidixemobemob.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/legoraxofupuz.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/15972760471.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/4879416668.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/36d74faa18ded69335232a08ddcba245/97977995583.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210610202625570.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c22b11712c---wunojawerodu.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/iq6vs7v1ph7dlt5cq6t3lvk4eu/vetivugikamapogogixemo.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/20f13bd97e8cc1cb1f5b35b709fed1b8/gexofepadomurepudosigob.pdfIn PDF document text
    • http://freeorden.com/media/file/goxibatexotefidudud.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/dogusirovaturafegijemaxan.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae6808e5c---50425300613.pdfIn PDF document text
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/wovawixaxanaxir.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/421303880.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_off0000ea7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 17872 bytes
SHA-256: df19dd053360261f8ebb5d7ce2426a99bdbfa10a9a5fc4adc56efd9d8ea25294
font_02_sfnt_off00013156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13156 10396 bytes
SHA-256: ada44afda3d732086c606eca380a15cfe8c6eb50e549021ccce877642961514d

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