Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6b78b76069c76d…

MALICIOUS

PDF

86.3 KB Created: 2021-08-29 13:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 30dae273e2bfa8ba1437d7586bb9abe1 SHA-1: c7169178d560fabd5f3a3f6d276f4794f3948f11 SHA-256: 9c6b78b76069c76d0b5dc35f813b93c3713865d97e37fcfc64e42d4bea84fe64
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://vyveva.eu/UserFiles/File/wanovabekugifixasotupa.pdf In PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/sm7bebgacoak5frms0g9magl3a/gitaxeferemugutokif.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/40658489155.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/31e2e1058e73170a05ac98cd8916e383/81230785802.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/belepadasiwesotapeka.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b71c7c4b84---64168180830.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/11241169483.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/9f8ba0b9c6da218d2d488723f64201db/12550408656.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/99061246693.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/pizegenuwuwaxudipimotip.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-6-22/20210622195756162697.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/nokek.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/6r8ubmv0d25upec40646nis2eb/xikerokukogutejoxekuf.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b41db76e88---68745018503.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/32390264892.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f94f5ae5e2925f5dde7aa8b98a9e04fc/pusos.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/43828623359.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/ritubujibene.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/bepotofoxejibuwok.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/64108812164.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/wodowakewipodotuge.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a96553d6fa---73476464409.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e86e2288e---85032183690.pdfIn PDF document text
    • http://lohoithaiduong.com/uploads/files/jimid.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/bevikuruzometizel.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8245d0824f3d7630567d69f9df2ef342/tomugenifav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=louis+tomlinson+look+after+youPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFB 10636 bytes
SHA-256: 6d5e60a80787b0c6be05d79ef9ee796430df968e5e2d89bb4929f288e554215f
font_01_sfnt_off0000e45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45F 18368 bytes
SHA-256: b3d1b0ad0a247d3b541ce9eb6210ce8ebdad7e6559697f091e69e255cf6fb52e
font_02_sfnt_off0001013b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001194d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 18860 bytes
SHA-256: 26db4820d9c2529364bb8c1061ba341b98a14b846c1aa5b9b7b4a5c9f634bd7f