Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2669a6d3c0a9ea…

MALICIOUS

PDF

71.7 KB Created: 2021-09-04 11:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5c76c9a22dd1e0bcc61703504fc9ccb6 SHA-1: 27dc230228bc5f234af2beb930c6dcfe326629ce SHA-256: cd2669a6d3c0a9eaec3585ce368606d1abf792a89b0bc0ba4db7b60f2d053623
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to compromised WordPress upload directories. This suggests a phishing or malware distribution scheme, leveraging a compromised site to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b15da7b4e9e---gesetitireperogitojaguseg.pdf In PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/3b2bcfe7df9623e1bcbec9eaf2998d1e/jowumurotamekajex.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/vajibi.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/sopasa.pdfIn PDF document text
    • http://cichanski.com/Upload/file/dopumumedubutupubabozox.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b940b85943c---vugapotumenu.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210506233555457.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/lulugupolulixen.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/d2a331c7e21c97c1e72e006099239c59/fanufubik.pdfIn PDF document text
    • http://biomehl.com/images/content/files/gurematofakofi.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/fewufuzogepuvofosokirulug.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/99d2bf32b18fb3461018a2cac674a947/77066413492.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/jstfa8irolrpbko5e9h84thrm7/mabimojaganufixow.pdfIn PDF document text
    • http://fedoro.ru/upload/file/dawibadobedezini.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/65937246210.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/64494435304.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/kivipadilurejuliwuv.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/d44bdfddd28af5dc1c2bf9861985b795/piminuko.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7c31bb5a2---19612294024.pdfIn PDF document text
    • http://yongqingtech.com/d/files/87135439565.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/tifuditigetamakixeponixes.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e4fe3736de0---bugubobogumirubipifisuf.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/faf3d5372c8ed31d1806b7e0cb37400f/purubawogaragufep.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a087d0941---46770315254.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=nombre+complexe+forme+exponentielle+pdfPDF 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_off0000b653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB653 17092 bytes
SHA-256: ec4818997427038c05609a83a256e7237f18717eafdd585b78ff370d0c9dd7ff
font_01_sfnt_off0000e13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13B 10668 bytes
SHA-256: bb72f68e8428080bc8855bb93cef6a3f5c0ba0c273388adc362c25e6109ed463
font_02_sfnt_off0000f95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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