Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92bb511bb943d82…

MALICIOUS

PDF

81.8 KB Created: 2021-09-16 08:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 07982cde76675c4b15778930a1c3c01a SHA-1: 860094f70c3f9268c729b74e3e37a28eef23ba8b SHA-256: a92bb511bb943d8205febb15155633a088a5be201f7ada8ee73f8246305f4cc4
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate the document functions as a link farm, directing users to compromised websites hosting PDF files, likely as part of a phishing or malware distribution scheme. The presence of multiple links on disposable hosting further supports 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 http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136838c53d96---kasakebo.pdf In PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393f53c9e6d---lemazepofisipu.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/mibosasuwikufa.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/34463988741.pdfIn PDF document text
    • http://honmamon-s.com/img_seminar/userfiles/file/26815150739.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/29495431027.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/vokuxuxalozarodadoj.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/69188581264.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/zuvosexajupidujizam.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/mopomuzufoxolixexo.pdfIn PDF document text
    • http://litroshaber.net/resimler/files/11385120755.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/32767183673.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc53dd104e---93971120.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161322ab73608a---21986664868.pdfIn PDF document text
    • https://weilmclainboiler.ca/fck_upload/file/sovoxasotiluvo.pdfIn PDF document text
    • https://technoarc.net/userfiles/file/53571404632.pdfIn PDF document text
    • http://neapol-m.ru/usr/file/jimogenasidiwigabijixosib.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/25011161601.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/zorasusexozujovatadufo.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/9ssb461vrb8em0lg2lp06pgct6/69195255624.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/66457247036.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/kiwovabufajotibezozugiw.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/taxopudimofotugelatodira.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=2k20+wwe+apk+downloadPDF link annotation
    • 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_off0000d8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 10248 bytes
SHA-256: 4d60edfd16ebd8dfb8c543e299030b35f215fd71d43da0dbcfc78123f8005bc2
font_02_sfnt_off00010828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10828 19096 bytes
SHA-256: 022f56ba1c7c1bad51dae84f74b7f54a37e04b38f8d10214cf47d3fcb6be1ce4

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