PDF malware analysis — malicious · e1b7dfcd8fbd4b64

MALICIOUS

PDF

61.3 KB Created: 2021-03-20 12:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 708b256a5e147635ae2fcfff8efe9041 SHA-1: 244d48e1563d0f9cd11ce616a22e329c23353baa SHA-256: e1b7dfcd8fbd4b644448da4c7431814b2faa073df205737d35882cbe2156bdad

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs and command execution tokens within the document text. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that aligns with the phishing lure. The embedded URL 'https://mezovuduw.ru/award?keyword=cours+pisciculture+pdf' is the primary indicator of the phishing attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9681

Heuristics 4

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.
External URI info PDF_URI

PDF contains an external URL action
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://mezovuduw.ru/award?keyword=cours+pisciculture+pdf PDF link annotation
- http://pusolaxunu.66ghz.com/70022877787.pdfIn PDF document text
- http://neliwiveles.22web.org/transformare_din_cm_in_inch.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4391899/normal_5fe29e2b20d32.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4383137/normal_5fc6f30b665eb.pdfIn PDF document text
- http://geesecam.com/what_are_the_five_major_rivers_in_new_mexicobwpua.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4428083/normal_60010d64088f6.pdfIn PDF document text
- http://oneitshop.info/how_to_connect_network_using_cmdsmcjz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446496/normal_601b6d294c4a0.pdfIn PDF document text
- https://s3.amazonaws.com/jupudizadid/asus_vg248qe_driver_windows_10.pdfIn PDF document text
- https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_d7c4daebf7754fef86b9984d52cc4985.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/kegovev/optiplex_7010_motherboard_diagram.pdfIn PDF document text
- https://s3.amazonaws.com/jobavo/9177170659.pdfIn PDF document text
- http://mesovinofezesat.epizy.com/catalogue_oriflame_maroc_avril_2020.pdfIn PDF document text
- https://s3.amazonaws.com/sejakopa/neposijasiwut.pdfIn PDF document text
- https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_2146407203e04d1dafbfee5171fecb3c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tibanepoxilibud/konidobelinogita.pdfIn PDF document text
- https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_02e4ed3e88864c979ac65829117c4506.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/novipaliwid/77895496207.pdfIn PDF document text
- https://s3.amazonaws.com/jusuberu/vakifukutamosibaseguxizaz.pdfIn macro / runtime command snippet
- https://s3.amazonaws.com/novipaliwid/7789549620In macro / runtime command snippet

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