Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6874ae98c95c7e3…

MALICIOUS

PDF

83.7 KB Created: 2021-09-04 09:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 73e34f4e1049b0bfcc11bff2d5d093ef SHA-1: f827a2a1bd1fe8b12a6e3bc82496586fc8081e72 SHA-256: e6874ae98c95c7e30f7e3d2a2e8216a9186e2e0d03b4d85f17135cf364162f7a
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 by an ML classifier as malicious. It contains numerous external URIs and links to compromised CMS upload storage, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=your+favorite+things+list+pdf PDF link annotation
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/b1eb7951eebb7f4f2bfec99771b0d902/26510572201.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/fulifopoligudugoxomuj.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dd5591e4a---mopezoginiwofukavumosito.pdfIn PDF document text
    • http://cmtsport.com/pliki/ginexexod.pdfIn PDF document text
    • https://ocw.tw/uploads/files/46643250901.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16252211851603938389.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/gekuvopilagikobutup.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-8-4/20210804065315960686.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/34124589704.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/kojalalolosixonizo.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae287ef1272---88030692360.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1609894ec2948f---40657310814.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/zulukeritumovoz.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/72336399491.pdfIn PDF document text
    • http://trimblehighalumni.com/clients/84492/File/futivugolotewasawejuzelif.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608453bb7fb53---dimexemawafon.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612c9a40614bf---87706191378.pdfIn PDF document text
    • https://actor-conseil.com/files/file/1524159186.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/56s7lrelufr1rjn17pnmm7u9k7/tanoxasirikuwuvuzar.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e527ec46c9c---14325208806.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/e7g8dev8p755jgd5hhourfpbn1/gufefuravol.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/80239220926.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c50a61e34dd---kazusoxinat.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3dee0a3453---91874583278.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_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 10924 bytes
SHA-256: 15a5896025322263bf919d88412176b08e89d203d4e9e2659415ad9e57797eab
font_01_sfnt_off0000fd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001151d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151D 17440 bytes
SHA-256: 24e1bc8fec67882bc9581e7d840acf35f0fa76235a6df322fc502804ebd8eaa7

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