Malicious PDF — malware analysis report

Static analysis result for SHA-256 4565144676882e57…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 06:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 259edd1493264e55bcd457985fc3c5ee SHA-1: 89ce2f8e26dfae1afb2610914edd6076dc330a32 SHA-256: 4565144676882e57b79e655abf94f3ce684258715269a4a7ad8ab4bdb56ef5d0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 0.9975

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://synerhu.ru/uplcv?utm_term=criminal+law+amendment+act+2013+bare+act+pdf PDF link annotation
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609885e2ef7f5---nunojuvizabegewewezusewo.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/35462844980.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/kl81b5u9860qkbli3t3npin35p/pirudaliwapese.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/96095400423.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/sorigowewozer.pdfIn PDF document text
    • http://nensi.si/upload/file/61904511912.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/77b267d2f47eb9dac7d405484af04f36/guvipopeg.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/mokcnpvb4av13kimvi28lq4t4n/81105028109.pdfIn PDF document text
    • https://j-kowalewski.pl/uploads/userfiles/files/18109474046.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/7c1e5b2e93546be6f17ac4347d49b037/fojerekuza.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/vubitotasebawegozabaluxi.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/fifixetobenebowajebux.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/wopilaxijida.pdfIn PDF document text
    • https://kristinanamaste.eu/files/metabejuto.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/90669361754.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084e93e554a6---guwakekufudijubinopufe.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/tiwaxoserijisakez.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/3l37g612dgtq7ev8k8ecqgs9uv/gepanapigujo.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/51977896248.pdfIn PDF document text
    • https://proxus.nl/file/67440812876.pdfIn PDF document text
    • http://honda-vo.com/upload/file/69395097469.pdfIn PDF document text
    • http://sms-dk.com/FileData/ckfinder/files/20210814_68C93271B3169737.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/54otd8s5e89o9ap4cghe7shus7/33928425882.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/28316661387.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/86645432468.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD603 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 17172 bytes
SHA-256: 77777b6261e62f83b5889406fe2f6cfbb2ec6a78d8494d8000a7c130ec3911a4
font_02_sfnt_off00011a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A58 11216 bytes
SHA-256: 56744e519e78faf079cf61fc5e31bf973984163b0a9c67856947f7d12e63316c

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