Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab2736551803621…

MALICIOUS

PDF

757.7 KB
MD5: c1bf1303ce3b2de0c2de9cd37af92145 SHA-1: fff7ae52f7e2be7e7acfa69c5fd9338705daeea7 SHA-256: aab27365518036218c37a1a9a4d30281d94ed62a922b302e9402bc233387caf2
86 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF file contains embedded JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. This script is responsible for initiating a connection to external URLs, with 'http://mailsupport.czechian.net/Label.html' being a notable example. The ClamAV detection 'Pdf.Dropper.Agent-7291493-0' further confirms its malicious nature. The embedded JavaScript likely serves to download and execute a second-stage payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0227

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-7291493-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7291493-0
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload (matched inside decoded stream)
  • 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 http://mailsupport.czechian.net/Label.html
    • http://uspsupport.borec.cz/Label.html
    • http://jamesmark2017.kvalitne.cz/Label.html
    • http://www.ariwadubstore.com/USPS/GoogleDrive-verfications/index.html
    • http://www.ariwadubstore.com/USPS/account/account/index.html
    • http://dairysciencepark.org.pk/Gdoc/GoogleDrive-verfications/
    • http://www.ariwadubstore.com/Connect.Shipment/GoogleDrive-verfications/index.html
    • http://fedexdelivery.ariwadubstore.com/fedex/Label.html
    • http://www.fedexdelivery.tompriceroofing.co.uk/fedex/Label.html
    • http://www.fedex.com.tompriceroofing.co.uk/local%20store/fedex/Label.html
    • http://www.fedexdelivery.ariwadubstore.com/fedex/Label.html
    • http://www.fedexsupport.gbssales.net/fedex/Label.html
    • http://www.kaosbwi.com/Fedexdelivery/fedex/Label.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://www.iec.ch

Extracted artifacts 15

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_000_off0000005c.js
9ccd84630ff3aa4f5e217885432d25fff0d616153d309e5df4300d7810dbded1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5C 1773 bytes
icc_00_off00001810.icc
653b586c4707574ffcd648ba35494daed2c76ceafcf4c07d315ed961b1dc347f		 pdf-icc-profile PDF ICC profile at offset 0x1810 408 bytes
icc_01_off00001947.icc
3f6d674174f3804eb0dabdac90ae17486e898c5063a66f861c116ea033da8301		 pdf-icc-profile PDF ICC profile at offset 0x1947 3144 bytes
icc_02_off0002d2f8.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0x2D2F8 3144 bytes
font_00_sfnt_off00031ead.bin
e77375d790dcd7f16f80c86fbd887d2d1cf8b2df6dcfc0f776b41a77f7864b6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31EAD 60604 bytes
font_01_sfnt_off0003c4e5.bin
b86ee8500c3e54c9d6dc63f2626d8691b45821b1de7ad4e5ad3158254da2c90b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C4E5 45704 bytes
font_02_sfnt_off000444c3.bin
74e898343abe2dd3c917bfd51927dec970a992b03959ef6959953cb356faa5e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x444C3 47154 bytes
font_03_sfnt_off0004d824.bin
ed7800fa2357bcb655b1e04e52febfc8fbec56c364b158b34b921abce91823fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D824 40492 bytes
font_04_sfnt_off00056c8a.bin
ed5733751bc89b498b420f6cd66ad6de15879c7428db7946a9bcb6f7b26ecb14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C8A 44100 bytes
font_05_sfnt_off00060db6.bin
8b0341e9209eb90d69f7c9288fd25fbd5c70ace4a485a3874f233401cafeaae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB6 47458 bytes
font_06_sfnt_off0006c01f.bin
464bc68ecc728eb58a4383099724e0236b1fe4d48964842cefb10262d936f197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C01F 46630 bytes
font_07_sfnt_off000900d8.bin
0c24a48c47d04930fe5a42705c4dfe80a933dad41a84bc6a50a4c0025e062f0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900D8 43554 bytes
font_08_sfnt_off0009c439.bin
41af096e3aa3e4a040352e521777bc04d9022b0cbbb81ef8566e76148f252d55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C439 44086 bytes
font_09_sfnt_off000abf0c.bin
ffa35174d51fbc98bd9b7899c5c64da8f73bf88f9d79695501c915ff59d4c892		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABF0C 47768 bytes
font_10_sfnt_off000b97d9.bin
511fc7b74bbb90ded6bb2f494064015da8bb38719fa3b947e02fac11170f9a4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB97D9 45692 bytes

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