Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3cfeb046bdfb7e4…

MALICIOUS

PDF

86.8 KB Created: 2021-09-22 21:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3b270daef927a0595165b79eb44cf754 SHA-1: 4b93bbafd10fec44728f65550a355ead0830cdab SHA-256: e3cfeb046bdfb7e4b3286d0a0da579b0263a3092272a9125cad368876b81c267
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It contains numerous links, some pointing to potentially compromised CMS upload storage and others to disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of 'LOLBin token sequence in document text' also suggests an attempt to execute commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://lamachine.nl/userfiles/file/mamowezapexife.pdf In PDF document text
    • http://charmingcurls.se/upload/file/puwulufikofexoxenen.pdfIn PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/pevojimevanevukolujefir.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/voxujixifetugorukumi.pdfIn PDF document text
    • https://ancoraeducacion.com/images/xevoxisupujibejujusew.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/1556515464.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/75088674427.pdfIn PDF document text
    • http://nhanvietgroup.com/demo/xay-dung-tnx/upload/files/28713914919.pdfIn PDF document text
    • http://wwstationery.com/files/file/kitupagivapaj.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/vemagosituvem.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/e105f5a5833e59dcc6916a5d52adeeb1/40428359048.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/74237909705.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/lekene.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/zulati.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/95527533715.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/kunagifumijin.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/55095939270.pdfIn PDF document text
    • http://ihdbd.org/upload/files/puxururimelasuri.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/laliwologajefekajis.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee11c9075c---sazexowil.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613838180143e---fulodopidukodidufuma.pdfIn PDF document text
    • https://5uempat.com/contents/files/97527334530.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/vonapubon.pdfIn PDF document text
    • http://vouchertIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=polimer+tv+serials+list+in+tamil+2016PDF 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_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10052 19924 bytes
SHA-256: 334ac400f145a7adabc120a71301a51c571c3726571cfe7495078071abca8040
font_02_sfnt_off0001349f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349F 10800 bytes
SHA-256: 53885485a1431df2a77b8d03c9cbc48620c4937819a3cbe8b6b72c26ce9c0dfc

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